Triangle read by rows: T(n,m) = Sum_{i=0..m} Stirling2(m+1,i+1)*(-1)^(m-i)*i^(n-m)*i!, for n >= 2, m = 1..n-1.

A272644

Triangle read by rows: T(n,m) = Sum_{i=0..m} Stirling2(m+1,i+1)*(-1)^(m-i)*i^(n-m)*i!, for n >= 2, m = 1..n-1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =1a(7) =13a(8) =13a(9) =1a(10) =1a(11) =29a(12) =73a(13) =29a(14) =1a(15) =1a(16) =61a(17) =301a(18) =301a(19) =61a(20) =1a(21) =1a(22) =125a(23) =1081a(24) =2069a(25) =1081a(26) =125a(27) =1a(28) =1a(29) =253

External references