Triangle T(n,k) = A015440(k) - A015440(n) + A015440(n-k), read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-4a(5) =1a(6) =1a(7) =-4a(8) =-4a(9) =1a(10) =1a(11) =-29a(12) =-29a(13) =-29a(14) =1a(15) =1a(16) =-54a(17) =-79a(18) =-79a(19) =-54a(20) =1a(21) =1a(22) =-204a(23) =-254a(24) =-279a(25) =-254a(26) =-204a(27) =1a(28) =1a(29) =-479