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A256205 Number of permutations in S_n that avoid the pattern 34215. 0
1, 1, 2, 6, 24, 119, 694, 4581, 33285, 260886, 2173374, 19032746, 173741467, 1642533692 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

Zvezdelina Stankova-Frenkel and Julian West, A new class of Wilf-equivalent permutations, arXiv:math/0103152.

CROSSREFS

Representatives for the 16 Wilf-equivalence patterns of length 5 are given in A116485, A047889, and A256195-A256208.

Cf. A099952.

Sequence in context: A256202 A256203 A256204 * A116485 A256206 A052397

Adjacent sequences:  A256202 A256203 A256204 * A256206 A256207 A256208

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 19 2015

STATUS

approved

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Last modified October 21 14:13 EDT 2019. Contains 328301 sequences. (Running on oeis4.)