A300855 Inverse of Knuth's base-5 based twisted permutation A220952 of the nonnegative integers.

0, 1, 2, 3, 4, 17, 16, 15, 14, 5, 18, 11, 12, 13, 6, 19, 10, 9, 8, 7, 20, 21, 22, 23, 24, 97, 96, 95, 94, 85, 48, 49, 50, 51, 84, 47, 54, 53, 52, 83, 46, 55, 56, 57, 82, 37, 36, 35, 34, 25, 98, 91, 92, 93, 86, 43, 66, 65, 64, 79, 44, 61, 62, 63, 80, 45, 60, 59, 58, 81

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..15624

Formula

A220952(9) = 5, therefore a(5) = 9.

Prog

(PARI) concat(0, Vec(vecsort(A220952, , 1))) \\ where A220952 is a vector of some N initial terms of that sequence without the leading a(0) = 0 (use ...[^1] to exclude the first element if needed) and such that these N values contain exactly all integers from 1 to N, e.g., N = 120.

Crossrefs

See A220952 for the inverse permutation, A300857 and its inverse A300856 for the base-7 variant.

Sequence in context: A229546 A365574 A343494 * A353164 A333835 A178683

Adjacent sequences: A300852 A300853 A300854 * A300856 A300857 A300858

Keyword

nonn,look

Author

M. F. Hasler, Mar 13 2018

Status

approved