A202228 Number of permutations avoiding the consecutive pattern 52341.

1, 2, 6, 24, 119, 708, 4914, 38982, 347869, 3449252, 37620655, 447627708, 5769915215, 80095218258, 1191261103432, 18898879914026, 318562100279543, 5685592510437500, 107112079379106657, 2124112747338010252, 44228883790175992996, 964801076036155315318

Offset

1,2

Comments

a(n) is the number of permutations on [n] that avoid the consecutive pattern 52341. It is the same as the number of permutations which avoid 14325.

Links

Ray Chandler, Table of n, a(n) for n = 1..40

A. Baxter, B. Nakamura, and D. Zeilberger. Automatic generation of theorems and proofs on enumerating consecutive Wilf-classes

Crossrefs

Cf. A177523, A202213-A202236.

Sequence in context: A202224 A202225 A202231 * A202230 A202232 A202234

Adjacent sequences: A202225 A202226 A202227 * A202229 A202230 A202231

Keyword

nonn

Author

Ray Chandler, Dec 15 2011

Status

approved