Triangle read by rows: T(n,k) = (k+1)(k+2)(n+2)(n+3)(6n^2 - 8n*k + 18n + 3k^2 - 11k + 12)/144 for 0<=k<=n.
A107981
Triangle read by rows: T(n,k) = (k+1)(k+2)(n+2)(n+3)(6n^2 - 8n*k + 18n + 3k^2 - 11k + 12)/144 for 0<=k<=n.
Terms
- a(0) =1a(1) =6a(2) =10a(3) =20a(4) =40a(5) =50a(6) =50a(7) =110a(8) =155a(9) =175a(10) =105a(11) =245a(12) =371a(13) =455a(14) =490a(15) =196a(16) =476a(17) =756a(18) =980a(19) =1120a(20) =1176a(21) =336a(22) =840a(23) =1380a(24) =1860a(25) =2220a(26) =2436a(27) =2520a(28) =540a(29) =1380
External references
- oeis: A107981