Partial sums of A066186.

Terms

a(0) =1a(1) =5a(2) =14a(3) =34a(4) =69a(5) =135a(6) =240a(7) =416a(8) =686a(9) =1106a(10) =1722a(11) =2646a(12) =3959a(13) =5849a(14) =8489a(15) =12185a(16) =17234a(17) =24164a(18) =33474a(19) =46014a(20) =62646a(21) =84690a(22) =113555a(23) =151355a(24) =200305a(25) =263641a(26) =344911a(27) =449015a(28) =581400a(29) =749520