a(n) = Fibonacci(n)*A004016(n) for n>=1, with a(0)=1, where A004016(n) is the number of integer solutions (x,y) to x^2 + x*y + y^2 = n.
A205966
a(n) = Fibonacci(n)*A004016(n) for n>=1, with a(0)=1, where A004016(n) is the number of integer solutions (x,y) to x^2 + x*y + y^2 = n.
Terms
- a(0) =1a(1) =6a(2) =0a(3) =12a(4) =18a(5) =0a(6) =0a(7) =156a(8) =0a(9) =204a(10) =0a(11) =0a(12) =864a(13) =2796a(14) =0a(15) =0a(16) =5922a(17) =0a(18) =0a(19) =50172a(20) =0a(21) =131352a(22) =0a(23) =0a(24) =0a(25) =450150a(26) =0a(27) =1178508a(28) =3813732a(29) =0
External references
- oeis: A205966