A130556 - OEIS

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A130556

A model of the atomic nucleus (Shell model of nucleus). A triangle.

1, 11, 1, 111, 1, 11, 1111, 11, 1, 111, 11111, 111, 1, 11, 1111, 111111, 1111, 11, 1, 111, 11111, 1111111, 11111, 111, 1, 11, 1111, 111111, 11111111, 111111, 1111, 11, 1, 111, 11111, 1111111 (list; table; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	COMMENTS	`1 is equal to 2 protons, 11 is equal to 2+2 protons, 111 is equal to 2+2+2 protons...` `Repunit numbers represent the subshells.`
	LINKS	`Table of n, a(n) for n=1..36.`
	EXAMPLE	`A geometric model of the shell structure of nucleus:` `...\|----------------------.i.----------------------\|` `...\|...\|------------------.h.------------------\|...\|` `...\|...\|...\|--------------.g.--------------\|...\|...\|` `...\|...\|...\|...\|----------.f.----------\|...\|...\|...\|` `...\|...\|...\|...\|...\|------.d.------\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|...\|--.p.--\|...\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|...\|...s...\|...\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|...\|.......\|...\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|.......1.......\|...\|...\|...\|...\|` `...\|...\|...\|...\|......11.......1.......\|...\|...\|...\|` `...\|...\|...\|......111......1......11.......\|...\|...\|` `...\|...\|.....1111.....11.......1......111......\|...\|` `...\|.....11111....111......1......11.....1111......\|` `....111111...1111.....11.......1......111....11111....` `1111111..11111....111......1......11.....1111...111111` `......................................................` `...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|...\|...\|1/2\|...\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|...\|----3/2----\|...\|...\|...\|...\|` `...\|...\|...\|...\|...\|--------5/2--------\|...\|...\|...\|` `...\|...\|...\|...\|------------7/2------------\|...\|...\|` `...\|...\|...\|----------------9/2----------------\|...\|` `...\|...\|-------------------11/2--------------------\|` `...\|----------------------.13/2.--------------------`
	CROSSREFS	`Cf. A056951, A130517, A130598, A130602.` `Sequence in context: A104490 A164851 A038713 * A277932 A290676 A290420` `Adjacent sequences: A130553 A130554 A130555 * A130557 A130558 A130559`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Omar E. Pol, Aug 09 2007, Aug 12 2007`
	STATUS	`approved`

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Last modified June 5 18:30 EDT 2024. Contains 373107 sequences. (Running on oeis4.)