Triangle T(n,k) read by rows: number of permutations in S_n avoiding all k-length patterns starting with fixed m, 2<k<=n, 1<=m<=k.

A104001

Triangle T(n,k) read by rows: number of permutations in S_n avoiding all k-length patterns starting with fixed m, 2<k<=n, 1<=m<=k.

Terms

    a(0) =2a(1) =4a(2) =6a(3) =8a(4) =18a(5) =24a(6) =16a(7) =54a(8) =96a(9) =120a(10) =32a(11) =162a(12) =384a(13) =600a(14) =720a(15) =64a(16) =486a(17) =1536a(18) =3000a(19) =4320a(20) =5040a(21) =128a(22) =1458a(23) =6144a(24) =15000a(25) =25920a(26) =35280a(27) =40320a(28) =256a(29) =4374

External references