Triangle T(n, k) = T(n, k-1) + (-1)^k*A060187(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.
A225356
Triangle T(n, k) = T(n, k-1) + (-1)^k*A060187(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) =-22a(5) =1a(6) =1a(7) =-75a(8) =-75a(9) =1a(10) =1a(11) =-236a(12) =1446a(13) =-236a(14) =1a(15) =1a(16) =-721a(17) =9822a(18) =9822a(19) =-721a(20) =1a(21) =1a(22) =-2178a(23) =58479a(24) =-201244a(25) =58479a(26) =-2178a(27) =1a(28) =1a(29) =-6551
External references
- oeis: A225356