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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =2a(7) =1a(8) =4a(9) =2a(10) =25a(11) =2a(12) =71a(13) =92a(14) =184a(15) =1632a(16) =1057a(17) =20398a(18) =11743a(19) =195759a(20) =143498a(21) =1579976a(22) =1504704a(23) =11198739a(24) =13454232a(25) =71662966