2099201
domain: N
Appears in sequences
- a(n) = 2 * (4^n + 2^n) + 1.at n=10A085601
- Expansion of (1 + 4*x - 6*x^2 - 16*x^3 + 20*x^4)/((1-x)*(1-2*x)*(1+2*x)*(1-2*x^2)).at n=21A171663
- Number of pieces after a sheet of paper is folded n times and cut diagonally.at n=22A257418
- Numbers m such that 2^m == -1/2 (mod m).at n=22A296369
- a(0)=2; for n > 0, a(n) = 2^(2*n-1) + 2^n + 1.at n=11A343175