Triangle T(n, k) = A172452(n) - A172452(k) - A172452(n-k), read by rows.

Terms

a(0) =-1a(1) =-1a(2) =-1a(3) =-1a(4) =-1a(5) =-1a(6) =-1a(7) =0a(8) =0a(9) =-1a(10) =-1a(11) =1a(12) =2a(13) =1a(14) =-1a(15) =-1a(16) =7a(17) =9a(18) =9a(19) =7a(20) =-1a(21) =-1a(22) =35a(23) =43a(24) =44a(25) =43a(26) =35a(27) =-1a(28) =-1a(29) =143