Let c(n) = x^(2^n-1)*(1-x^(2^n)), g(n) = 1 + x^(2^n-1) + x^(2^n), h(n) = Product_{i=1..n} g(i); then use g.f. Sum_{n>=1} c(n)/h(n).
A151676
Let c(n) = x^(2^n-1)*(1-x^(2^n)), g(n) = 1 + x^(2^n-1) + x^(2^n), h(n) = Product_{i=1..n} g(i); then use g.f. Sum_{n>=1} c(n)/h(n).
Terms
- a(0) =0a(1) =1a(2) =-1a(3) =0a(4) =1a(5) =-1a(6) =-1a(7) =1a(8) =0a(9) =0a(10) =2a(11) =-1a(12) =-2a(13) =0a(14) =-2a(15) =1a(16) =5a(17) =1a(18) =-1a(19) =-3a(20) =-7a(21) =-1a(22) =8a(23) =8a(24) =6a(25) =-3a(26) =-18a(27) =-16a(28) =0a(29) =17
External references
- oeis: A151676