699052
domain: N
Appears in sequences
- Number of distinct quadratic residues mod 2^n.at n=22A023105
- Number of distinct quadratic residues mod 4^n.at n=11A039301
- Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=20A052953
- a(n) = -a(n-1) + 2*a(n-2), a(0)=1, a(1)=2.at n=21A084247
- Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).at n=20A097073
- Jacobsthal numbers(A001045) + 1.at n=21A128209
- First differences of A130624.at n=19A130625
- Row sums of triangle A135230.at n=20A135231
- Second differences of Jacobsthal sequence A001045, pairs with even and odd indices swapped.at n=20A140505
- First differences of A133730.at n=42A141416
- Jacobsthal numbers A001045, every second term incremented by 1.at n=21A155944
- a(n) = ceiling((2^n+n-1)/n).at n=23A373895
- Number of non-colorable strings of length n considered by the alternating coloring function.at n=22A378105