A064707 Inverse square of permutation defined by A003188.

0, 1, 2, 3, 5, 4, 7, 6, 10, 11, 8, 9, 15, 14, 13, 12, 21, 20, 23, 22, 16, 17, 18, 19, 31, 30, 29, 28, 26, 27, 24, 25, 42, 43, 40, 41, 47, 46, 45, 44, 32, 33, 34, 35, 37, 36, 39, 38, 63, 62, 61, 60, 58, 59, 56, 57, 53, 52, 55, 54, 48, 49, 50, 51, 85, 84, 87, 86, 80, 81, 82, 83

Offset: 0

Author

N. J. A. Sloane, Oct 13 2001

Keywords

• nonn
• look
• easy

Comments

Not the same as A100281: a(n)=A100281(n)=A099896(A099896(n)) only for n<64. - Reinhard Zumkeller, Nov 11 2004

Links

• Ivan Neretin, Table of n, a(n) for n = 0..8191
• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Inverse of permutation defined by A064706. Cf. A003188.

Programs

MATLAB

A = 1; for i = 1:7 B = A(end:-1:1); A = [A (B + length(A))]; end C = A(A); for i = 1:128 A(C(i)) = i - 1; end A

Formula

a(n) = A180200(A233279(n)), n > 0. - Yosu Yurramendi, Apr 05 2017

Extensions

More terms from David Wasserman, Aug 02 2002