Number of strings of numbers x(i=1..7) in 0..n with sum i*x(i)^3 equal to 7*n^3.

Terms

a(0) =5a(1) =22a(2) =39a(3) =125a(4) =209a(5) =356a(6) =560a(7) =929a(8) =1348a(9) =2003a(10) =2791a(11) =3848a(12) =4842a(13) =6474a(14) =8186a(15) =10319a(16) =13169a(17) =16049a(18) =19588a(19) =24134a(20) =28755a(21) =34513a(22) =40850a(23) =47285a(24) =55523a(25) =63884a(26) =73472a(27) =85289a(28) =97062a(29) =110655