Antidiagonal sums of the convolution array A213561.

Terms

a(0) =1a(1) =10a(2) =51a(3) =182a(4) =518a(5) =1260a(6) =2730a(7) =5412a(8) =9999a(9) =17446a(10) =29029a(11) =46410a(12) =71708a(13) =107576a(14) =157284a(15) =224808a(16) =314925a(17) =433314a(18) =586663a(19) =782782a(20) =1030722a(21) =1340900a(22) =1725230a(23) =2197260a(24) =2772315a(25) =3467646a(26) =4302585a(27) =5298706a(28) =6479992a(29) =7873008