A202220 Number of permutations avoiding the consecutive pattern 53241.

1, 2, 6, 24, 119, 708, 4914, 38979, 347815, 3448442, 37608834, 447450930, 5767170785, 80050654711, 1190502148797, 18885313699983, 318307710883720, 5680593325882836, 107009253612595865, 2121902210596869336, 44179286193550935095, 963641311893918317652

Offset: 1

Author

Ray Chandler, Dec 15 2011

Keywords

• nonn

Comments

a(n) is the number of permutations on [n] that avoid the consecutive pattern 53241. It is the same as the number of permutations which avoid 13425, 14235 or 53241.

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.