Number of nondecreasing strings of numbers x(i=1..8) in -n..n with sum x(i)^3 equal to 0.

Terms

a(0) =5a(1) =15a(2) =37a(3) =84a(4) =170a(5) =346a(6) =552a(7) =817a(8) =1319a(9) =1951a(10) =2817a(11) =4262a(12) =5776a(13) =7388a(14) =9688a(15) =12753a(16) =16301a(17) =21555a(18) =27327a(19) =33924a(20) =41412a(21) =50882a(22) =60750a(23) =74369a(24) =88987a(25) =105041a(26) =125725a(27) =146194a(28) =169316a(29) =199468