Triangle read by rows: T(n,k) is the number of permutations p of [n] having length of first run equal to k.

A092582

Triangle read by rows: T(n,k) is the number of permutations p of [n] having length of first run equal to k.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =1a(6) =12a(7) =8a(8) =3a(9) =1a(10) =60a(11) =40a(12) =15a(13) =4a(14) =1a(15) =360a(16) =240a(17) =90a(18) =24a(19) =5a(20) =1a(21) =2520a(22) =1680a(23) =630a(24) =168a(25) =35a(26) =6a(27) =1a(28) =20160a(29) =13440

External references