Number of strings of numbers x(i=1..n) in 0..2 with sum i^3*x(i) equal to n^3*2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =3a(6) =5a(7) =4a(8) =17a(9) =18a(10) =28a(11) =74a(12) =109a(13) =183a(14) =491a(15) =759a(16) =1118a(17) =2986a(18) =4480a(19) =7212a(20) =17741a(21) =28158a(22) =45715a(23) =100767a(24) =166088a(25) =267176a(26) =577835a(27) =953092a(28) =1574492a(29) =3267846