A303578 List of starts of nondecreasing runs of values of d(n) (the divisor function A000005(n)).

1, 5, 7, 9, 11, 13, 17, 19, 21, 23, 25, 29, 31, 33, 37, 41, 43, 46, 47, 49, 51, 53, 55, 57, 59, 61, 65, 67, 69, 71, 73, 77, 79, 81, 82, 83, 85, 89, 91, 93, 97, 101, 103, 106, 107, 109, 111, 113, 115, 118, 121, 125, 127, 129, 131, 133, 137, 139, 141, 145, 149, 151, 153, 155, 157, 161, 163, 166, 167, 169, 171, 173, 175

Offset

1,2

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Prog

(AWK) # Assume that b.txt contains a b-file for A000005
awk ' BEGIN {i = 1; print i}
      {if ($2 < i) print $1; i = $2} ' b.txt >out

Crossrefs

Cf. A000005.

A303577 gives the lengths of the successive runs.

A284597(m) is the smallest number that starts a run of length m.

Sequence in context: A065155 A230203 A339910 * A282057 A336366 A088502

Adjacent sequences: A303575 A303576 A303577 * A303579 A303580 A303581

Keyword

nonn

Author

N. J. A. Sloane, Apr 29 2018

Status

approved