Third partial sums of fourth powers (A000583).

Terms

a(0) =1a(1) =19a(2) =135a(3) =605a(4) =2054a(5) =5778a(6) =14178a(7) =31350a(8) =63855a(9) =121693a(10) =219505a(11) =378027a(12) =625820a(13) =1001300a(14) =1555092a(15) =2352732a(16) =3477741a(17) =5035095a(18) =7155115a(19) =9997801a(20) =13757634a(21) =18668870a(22) =25011350a(23) =33116850a(24) =43375995a(25) =56245761a(26) =72257589a(27) =92026135a(28) =116258680a(29) =145765224