-274877906944
domain: Z
Appears in sequences
- Expansion of (1-4x+24x^2)/((1-4x)(1+4x)).at n=19A091104
- Expansion of g.f. (1 + 2*x) / (1 + 2*x + 4*x^2).at n=38A104538
- Hankel transform of Sum_{k=0..n} C(2k,k).at n=38A120580
- Expansion of (1-8*x)/(1-4*x+16*x^2).at n=19A138340
- Expansion of 1/(1 + 4*x + 8*x^2).at n=25A143462
- Powers of -4.at n=19A262710
- a(n) = 4*a(n-1) - 8*a(n-2) with a(0) = a(1) = 1.at n=26A363092