Seventh partial sums of fourth powers (A000583).

Terms

a(0) =1a(1) =23a(2) =221a(3) =1355a(4) =6239a(5) =23465a(6) =75803a(7) =217373a(8) =566150a(9) =1361802a(10) =3063502a(11) =6508450a(12) =13159666a(13) =25481470a(14) =47493274a(15) =85567222a(16) =149553199a(17) =254336185a(18) =421956275a(19) =684451365a(20) =1087616985a(21) =1695917535a(22) =2598828765a(23) =3918943275a(24) =5822229660a(25) =8530902276a(26) =12339433068