A250471 Permutation of natural numbers: a(n) = (A250469(n) + 1) / 2.

1, 2, 3, 5, 4, 8, 6, 11, 13, 14, 7, 17, 9, 20, 18, 23, 10, 26, 12, 29, 28, 32, 15, 35, 25, 38, 33, 41, 16, 44, 19, 47, 43, 50, 39, 53, 21, 56, 48, 59, 22, 62, 24, 65, 58, 68, 27, 71, 61, 74, 63, 77, 30, 80, 46, 83, 73, 86, 31, 89, 34, 92, 78, 95, 60, 98, 36, 101, 88, 104, 37, 107, 40, 110, 93, 113, 72, 116, 42, 119, 103, 122, 45, 125, 67, 128, 108, 131, 49

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..5002

Index entries for sequences that are permutations of the natural numbers

Formula

a(n) = (A250469(n) + 1) / 2.

Prog

(Scheme) (define (A250471 n) (/ (+ 1 (A250469 n)) 2))

Crossrefs

Inverse: A250472.

Cf. A048673, A250469.

Sequence in context: A065561 A245708 A126917 * A086496 A102398 A118317

Adjacent sequences: A250468 A250469 A250470 * A250472 A250473 A250474

Keyword

nonn

Author

Antti Karttunen, Dec 06 2014

Status

approved