A158431 Number of permutations of 1..n containing the relative rank sequence { 45231 } at any spacing.

1, 26, 458, 6995, 101027, 1436898, 20572392, 300418660, 4513021536, 70158846231, 1133525183816, 19092510077724

Offset

5,2

Comments

Same series for 53421 13245 12435 54231 21435 13254 53412

Links

Table of n, a(n) for n=5..16.

Eric Weisstein's World of Mathematics, Permutation Pattern

Crossrefs

A056986 A158005

Sequence in context: A021984 A025954 A158436 * A158432 A021974 A158433

Adjacent sequences: A158428 A158429 A158430 * A158432 A158433 A158434

Keyword

nonn

Author

R. H. Hardin Mar 18 2009

Status

approved