Number of permutations of [n] avoiding the consecutive pattern 1243.

A117226

Number of permutations of [n] avoiding the consecutive pattern 1243.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =110a(6) =630a(7) =4204a(8) =32054a(9) =274914a(10) =2619692a(11) =27459344a(12) =313990182a(13) =3889585408a(14) =51888955808a(15) =741668212080

External references