Number of nondecreasing strings of numbers x(i=1..n) in -5..5 with sum x(i)^3 equal to 0.

Terms

a(0) =1a(1) =6a(2) =6a(3) =21a(4) =21a(5) =62a(6) =68a(7) =170a(8) =216a(9) =450a(10) =644a(11) =1154a(12) =1752a(13) =2850a(14) =4364a(15) =6679a(16) =10023a(17) =14742a(18) =21454a(19) =30667a(20) =43335a(21) =60506a(22) =83372a(23) =113948a(24) =153702a(25) =205870a(26) =272696a(27) =358636a(28) =467554a(29) =605084