Number of strings of numbers x(i=1..n) in 0..4 with sum i*x(i)^3 equal to n*64.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =6a(5) =22a(6) =125a(7) =467a(8) =1669a(9) =6070a(10) =22559a(11) =82566a(12) =297554a(13) =1051581a(14) =3645141a(15) =12437607a(16) =41861648a(17) =138913639a(18) =454992647a(19) =1471640292a(20) =4703510789a(21) =14860920840a(22) =46445544294a(23) =143657460676a(24) =439924290065