Antidiagonal sums of the convolution array A213828.

Terms

a(0) =2a(1) =18a(2) =78a(3) =230a(4) =540a(5) =1092a(6) =1988a(7) =3348a(8) =5310a(9) =8030a(10) =11682a(11) =16458a(12) =22568a(13) =30240a(14) =39720a(15) =51272a(16) =65178a(17) =81738a(18) =101270a(19) =124110a(20) =150612a(21) =181148a(22) =216108a(23) =255900a(24) =300950a(25) =351702a(26) =408618a(27) =472178a(28) =542880a(29) =621240