Table T(n,m) read by rows: the coefficient of [t^n x^m] of 2*n!*(n+2)!*exp(x*t)*( t*(1-exp(t))-exp(t) ) / (1-exp(t) ), 0<=m<=n+1.
A176990
Table T(n,m) read by rows: the coefficient of [t^n x^m] of 2*n!*(n+2)!*exp(x*t)*( t*(1-exp(t))-exp(t) ) / (1-exp(t) ), 0<=m<=n+1.
Terms
- a(0) =2a(1) =4a(2) =13a(3) =6a(4) =6a(5) =0a(6) =104a(7) =24a(8) =16a(9) =-2a(10) =0a(11) =780a(12) =120a(13) =60a(14) =0a(15) =-48a(16) =0a(17) =6240a(18) =720a(19) =288a(20) =40a(21) =0a(22) =-840a(23) =0a(24) =54600a(25) =5040a(26) =1680a(27) =0a(28) =1920a(29) =0
External references
- oeis: A176990