Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 12 and t = 132.

A324134

Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 12 and t = 132.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =710a(7) =4800a(8) =36298a(9) =302780a(10) =2758618a(11) =27246450a(12) =289962508a(13) =3308024082a(14) =40278949800a(15) =521427324542

External references