Triangle T(n,k) = A015442(k) - A015442(n) + A015442(n-k) read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-6a(5) =1a(6) =1a(7) =-6a(8) =-6a(9) =1a(10) =1a(11) =-55a(12) =-55a(13) =-55a(14) =1a(15) =1a(16) =-104a(17) =-153a(18) =-153a(19) =-104a(20) =1a(21) =1a(22) =-496a(23) =-594a(24) =-643a(25) =-594a(26) =-496a(27) =1a(28) =1a(29) =-1231