Antidiagonal sums of the convolution array A213849.

Terms

a(0) =1a(1) =3a(2) =10a(3) =20a(4) =42a(5) =70a(6) =120a(7) =180a(8) =275a(9) =385a(10) =546a(11) =728a(12) =980a(13) =1260a(14) =1632a(15) =2040a(16) =2565a(17) =3135a(18) =3850a(19) =4620a(20) =5566a(21) =6578a(22) =7800a(23) =9100a(24) =10647a(25) =12285a(26) =14210a(27) =16240a(28) =18600a(29) =21080