Third partial sums of fifth powers (A000584).

Terms

a(0) =1a(1) =35a(2) =345a(3) =1955a(4) =7990a(5) =26226a(6) =73470a(7) =182490a(8) =412335a(9) =863005a(10) =1695551a(11) =3158805a(12) =5624060a(13) =9629140a(14) =15933420a(15) =25585476a(16) =40005165a(17) =61082055a(18) =91292245a(19) =133835735a(20) =192796626a(21) =273328550a(22) =381867850a(23) =526377150a(24) =716622075a(25) =964484001a(26) =1284311835