Partial sums of A034897.

Terms

a(0) =6a(1) =27a(2) =55a(3) =356a(4) =681a(5) =1177a(6) =1874a(7) =3207a(8) =5116a(9) =7157a(10) =9290a(11) =13191a(12) =21319a(13) =32012a(14) =48525a(15) =68046a(16) =92647a(17) =119624a(18) =170925a(19) =267286a(20) =397439a(21) =557280a(22) =720481a(23) =897142a(24) =1111415a(25) =1361736a(26) =1637569a(27) =1933910a(28) =2240091a(29) =2629684