Antidiagonal sums of the convolution array A213833.

Terms

a(0) =1a(1) =10a(2) =46a(3) =140a(4) =335a(5) =686a(6) =1260a(7) =2136a(8) =3405a(9) =5170a(10) =7546a(11) =10660a(12) =14651a(13) =19670a(14) =25880a(15) =33456a(16) =42585a(17) =53466a(18) =66310a(19) =81340a(20) =98791a(21) =118910a(22) =141956a(23) =168200a(24) =197925a(25) =231426a(26) =269010a(27) =310996a(28) =357715a(29) =409510