Third partial sums of sixth powers (A001014).

Terms

a(0) =1a(1) =67a(2) =927a(3) =6677a(4) =32942a(5) =126378a(6) =404634a(7) =1129854a(8) =2833479a(9) =6515509a(10) =13947505a(11) =28115451a(12) =53846156a(13) =98669156a(14) =173975076a(15) =296541132a(16) =490504893a(17) =789878583a(18) =1241708083a(19) =1909993393a(20) =2880500634a(21) =4266609710a(22) =6216356510a(23) =8920844010a(24) =12624212835a(25) =17635378761