Define P(n,X) by the recursion P(1,X) = 1, P(n+1,X) = (P(n,X)+X)^2; then a(1) = 0 and for n > 1 a(n) is the coefficient of X^(2^(n-2)) in P(n,X) of degree 2^(n-1).
A070256
Define P(n,X) by the recursion P(1,X) = 1, P(n+1,X) = (P(n,X)+X)^2; then a(1) = 0 and for n > 1 a(n) is the coefficient of X^(2^(n-2)) in P(n,X) of degree 2^(n-1).
Terms
- a(0) =0a(1) =2a(2) =11a(3) =207a(4) =99919a(5) =32416037103
External references
- oeis: A070256