Number of nondecreasing strings of numbers x(i=1..n) in -6..6 with sum x(i)^3 equal to 0.

Terms

a(0) =1a(1) =7a(2) =7a(3) =30a(4) =30a(5) =106a(6) =114a(7) =346a(8) =422a(9) =1070a(10) =1482a(11) =3166a(12) =4778a(13) =8954a(14) =14026a(15) =23987a(16) =37639a(17) =60443a(18) =93145a(19) =143096a(20) =214982a(21) =319514a(22) =467648a(23) =676718a(24) =966748a(25) =1367076a(26) =1911186a(27) =2647754a(28) =3631406a(29) =4939378