Antidiagonal sums of the convolution array A213558.

Terms

a(0) =1a(1) =24a(2) =236a(3) =1400a(4) =6009a(5) =20608a(6) =59952a(7) =153792a(8) =357225a(9) =765688a(10) =1535820a(11) =2913560a(12) =5270993a(13) =9153600a(14) =15339712a(15) =24914112a(16) =39357873a(17) =60656664a(18) =91429900a(19) =135083256a(20) =195987209a(21) =279684416a(22) =393128880a(23) =544960000a(24) =745814745a(25) =1008681336a(26) =1349297964a(27) =1786600216a(28) =2343221025