Triangle T(n,k), 0 <= k <= n, defined by : T(n,k) = 0 if k < 0, T(0,k) = 0^k, (n+2)*(2*n-2*k+1)*T(n,k) = (2*n+1)*( 4*(2*n-2*k+1)*T(n-1,k-1) + (n+2*k+2)*T(n-1,k) ).
A123382
Triangle T(n,k), 0 <= k <= n, defined by : T(n,k) = 0 if k < 0, T(0,k) = 0^k, (n+2)*(2*n-2*k+1)*T(n,k) = (2*n+1)*( 4*(2*n-2*k+1)*T(n-1,k-1) + (n+2*k+2)*T(n-1,k) ).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =1a(4) =15a(5) =20a(6) =1a(7) =35a(8) =168a(9) =112a(10) =1a(11) =66a(12) =714a(13) =1680a(14) =672a(15) =1a(16) =110a(17) =2178a(18) =11352a(19) =15840a(20) =4224a(21) =1a(22) =169a(23) =5434a(24) =51051a(25) =156156a(26) =144144a(27) =27456a(28) =1a(29) =245
External references
- oeis: A123382