Triangle T(n, k) read by rows: T(n, k) = S2(n, k)*k! + S2(n, k-1)*(k-1)! with the Stirling2 triangle S2 = A048993.
A285867
Triangle T(n, k) read by rows: T(n, k) = S2(n, k)*k! + S2(n, k-1)*(k-1)! with the Stirling2 triangle S2 = A048993.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =3a(6) =0a(7) =1a(8) =7a(9) =12a(10) =0a(11) =1a(12) =15a(13) =50a(14) =60a(15) =0a(16) =1a(17) =31a(18) =180a(19) =390a(20) =360a(21) =0a(22) =1a(23) =63a(24) =602a(25) =2100a(26) =3360a(27) =2520a(28) =0a(29) =1
External references
- oeis: A285867