Array t(n, k) = (k*(n-1) +2-k)*t(n-1, k) + k*t(n-2, k), with t(1, k) = 1, t(2, k) = 2, read by antidiagonals.
A144446
Array t(n, k) = (k*(n-1) +2-k)*t(n-1, k) + k*t(n-2, k), with t(1, k) = 1, t(2, k) = 2, read by antidiagonals.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =7a(4) =2a(5) =1a(6) =30a(7) =10a(8) =2a(9) =1a(10) =157a(11) =64a(12) =13a(13) =2a(14) =1a(15) =972a(16) =532a(17) =110a(18) =16a(19) =2a(20) =1a(21) =6961a(22) =5448a(23) =1249a(24) =168a(25) =19a(26) =2a(27) =1a(28) =56660a(29) =66440
External references
- oeis: A144446