11184812
domain: N
Appears in sequences
- Number of distinct quadratic residues mod 2^n.at n=26A023105
- Number of distinct quadratic residues mod 4^n.at n=13A039301
- Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=24A052953
- a(n) = -a(n-1) + 2*a(n-2), a(0)=1, a(1)=2.at n=25A084247
- Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).at n=24A097073
- Jacobsthal numbers(A001045) + 1.at n=25A128209
- Second differences of A130624.at n=23A130626
- a(n+3) = 3*(a(n+2) - a(n+1)) + 2*a(n).at n=25A130707
- a(n) = 3a(n-1) - 3a(n-2) + 2a(n-3), a(0) = 3, a(1) = 2, a(2) = 0.at n=25A131370
- Row sums of triangle A135230.at n=24A135231
- Second differences of Jacobsthal sequence A001045, pairs with even and odd indices swapped.at n=24A140505
- Jacobsthal numbers A001045, every second term incremented by 1.at n=25A155944
- a(n) = 2*(1+(-1)^n)/3 + 2*A010892(n-1).at n=25A191370
- Number of non-colorable strings of length n considered by the alternating coloring function.at n=26A378105