Triangle T(n, k) = (-1)^n*StirlingS1(n, j)*StirlingS1(n, n-j), with T(n, 0) = T(n, n) = 1, read by rows.
A155868
Triangle T(n, k) = (-1)^n*StirlingS1(n, j)*StirlingS1(n, n-j), with T(n, 0) = T(n, n) = 1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =6a(8) =6a(9) =1a(10) =1a(11) =36a(12) =121a(13) =36a(14) =1a(15) =1a(16) =240a(17) =1750a(18) =1750a(19) =240a(20) =1a(21) =1a(22) =1800a(23) =23290a(24) =50625a(25) =23290a(26) =1800a(27) =1a(28) =1a(29) =15120
External references
- oeis: A155868