A264978 - OEIS

A264978

Self-inverse permutation of nonnegative integers: a(n) = A263273(8*n)/8.

0, 1, 2, 3, 8, 5, 6, 7, 4, 9, 10, 17, 24, 26, 14, 15, 23, 11, 18, 29, 20, 21, 25, 16, 12, 22, 13, 27, 28, 19, 30, 71, 44, 51, 62, 35, 72, 89, 53, 78, 80, 41, 42, 68, 32, 45, 86, 59, 69, 77, 50, 33, 65, 38, 54, 83, 56, 87, 74, 47, 60, 61, 34, 63, 88, 52, 75, 79, 43, 48, 70, 31, 36, 85, 58, 66, 76, 49, 39, 67, 40, 81

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OFFSET

0,3

COMMENTS

Note that n=13 is the first point where this involution does not preserve the parity as a(13) = 26.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..7381

Index entries for sequences that are permutations of the natural numbers

FORMULA

a(n) = A263273(8*n)/8.

a(n) = A263272(4*n)/4.

a(n) = A264974(2*n)/2.