Triangle T : T(n,k)= binomial(n,k)*A000957(n+1-k).

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =2a(7) =3a(8) =0a(9) =1a(10) =6a(11) =8a(12) =6a(13) =0a(14) =1a(15) =18a(16) =30a(17) =20a(18) =10a(19) =0a(20) =1a(21) =57a(22) =108a(23) =90a(24) =40a(25) =15a(26) =0a(27) =1a(28) =186a(29) =399