Triangle T(n, k) = T(n, k-1) + (-1)^k*A142458(n+2, k+1) if k <= floor(n/2), otherwise T(n, n-k), with T(n, 0) = T(n, n) = 1, read by rows.
A225433
Triangle T(n, k) = T(n, k-1) + (-1)^k*A142458(n+2, k+1) if k <= floor(n/2), otherwise T(n, n-k), with T(n, 0) = T(n, n) = 1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-38a(5) =1a(6) =1a(7) =-165a(8) =-165a(9) =1a(10) =1a(11) =-676a(12) =4806a(13) =-676a(14) =1a(15) =1a(16) =-2723a(17) =44452a(18) =44452a(19) =-2723a(20) =1a(21) =1a(22) =-10914a(23) =362895a(24) =-1346780a(25) =362895a(26) =-10914a(27) =1a(28) =1a(29) =-43681
External references
- oeis: A225433