Number of strings of numbers x(i=1..n) in 0..2 with sum i*x(i)^3 equal to n*8.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =5a(5) =9a(6) =22a(7) =47a(8) =95a(9) =197a(10) =394a(11) =819a(12) =1701a(13) =3493a(14) =7116a(15) =14361a(16) =28758a(17) =57108a(18) =112520a(19) =219936a(20) =426311a(21) =819230a(22) =1560326a(23) =2944805a(24) =5505613a(25) =10195038a(26) =18696068a(27) =33951438a(28) =61053269a(29) =108723478