A269355 Permutation of natural numbers: a(n) = A269380(A250469(n)).

1, 2, 3, 4, 5, 6, 7, 8, 23, 10, 11, 12, 13, 14, 15, 16, 9, 18, 17, 20, 31, 22, 25, 24, 21, 26, 27, 28, 19, 30, 29, 32, 49, 34, 71, 36, 37, 38, 39, 40, 41, 42, 43, 44, 107, 46, 47, 48, 119, 50, 51, 52, 35, 54, 89, 56, 101, 58, 53, 60, 61, 62, 63, 64, 115, 66, 67, 68, 173, 70, 55, 72, 33, 74, 75, 76, 131, 78, 77, 80, 167

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Index entries for sequences that are permutations of the natural numbers

Formula

a(n) = A269380(A250469(n)).

Other identities. For all n >= 1:

a(2n) = 2n. [Fixes the even numbers.]

Example

For n=9 we first find what number is below 9 in square array A083221, which is 25, then we find what number is above 25 in square array A255127, which is 23, thus a(9) = 23.

Prog

(Scheme) (define (A269355 n) (A269380 (A250469 n)))

Crossrefs

Inverse: A269356.

Cf. A250469, A269380.

Cf. also arrays A083221 & A255127.

More recursed variant: A269357. Cf. also permutations A266645, A255407, A269171.

Sequence in context: A215888 A240963 A053408 * A269357 A335900 A096986

Adjacent sequences: A269352 A269353 A269354 * A269356 A269357 A269358

Keyword

nonn

Author

Antti Karttunen, Mar 03 2016

Status

approved