Fifth partial sums of seventh powers (A001015).

Terms

a(0) =1a(1) =133a(2) =2842a(3) =29274a(4) =197400a(5) =1001952a(6) =4137966a(7) =14597934a(8) =45454773a(9) =127861825a(10) =330540028a(11) =795609724a(12) =1801339176a(13) =3867558072a(14) =7926516900a(15) =15591322404a(16) =29566276257a(17) =54259095093a(18) =96674782246a(19) =167695627750a(20) =283882296880