Number of strings of numbers x(i=1..4) in 0..n with sum i^2*x(i) equal to n*16.

Terms

a(0) =1a(1) =1a(2) =4a(3) =8a(4) =14a(5) =21a(6) =32a(7) =48a(8) =61a(9) =82a(10) =108a(11) =139a(12) =172a(13) =210a(14) =256a(15) =311a(16) =365a(17) =427a(18) =500a(19) =582a(20) =666a(21) =759a(22) =864a(23) =982a(24) =1097a(25) =1228a(26) =1372a(27) =1529a(28) =1688a(29) =1860