Partial sums of A034263.

Terms

a(0) =1a(1) =10a(2) =49a(3) =168a(4) =462a(5) =1092a(6) =2310a(7) =4488a(8) =8151a(9) =14014a(10) =23023a(11) =36400a(12) =55692a(13) =82824a(14) =120156a(15) =170544a(16) =237405a(17) =324786a(18) =437437a(19) =580888a(20) =761530a(21) =986700a(22) =1264770a(23) =1605240a(24) =2018835a(25) =2517606a(26) =3115035a(27) =3826144a(28) =4667608a(29) =5657872