Second partial sums of sixth powers (A001014).

Terms

a(0) =1a(1) =66a(2) =860a(3) =5750a(4) =26265a(5) =93436a(6) =278256a(7) =725220a(8) =1703625a(9) =3682030a(10) =7431996a(11) =14167946a(12) =25730705a(13) =44823000a(14) =75305920a(15) =122566056a(16) =193963761a(17) =299373690a(18) =451829500a(19) =668285310a(20) =970507241a(21) =1386109076a(22) =1949746800a(23) =2704487500