715827884

Appears in sequences

• Number of distinct quadratic residues mod 2^n.at n=32A023105
• Number of distinct quadratic residues mod 4^n.at n=16A039301
• Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=30A052953
• a(n) = -a(n-1) + 2*a(n-2), a(0)=1, a(1)=2.at n=31A084247
• Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).at n=30A097073
• Jacobsthal numbers(A001045) + 1.at n=31A128209
• Second differences of A130624.at n=29A130626
• a(n+3) = 3*(a(n+2) - a(n+1)) + 2*a(n).at n=31A130707
• a(n) = 3a(n-1) - 3a(n-2) + 2a(n-3), a(0) = 3, a(1) = 2, a(2) = 0.at n=31A131370
• Row sums of triangle A135230.at n=30A135231
• Second differences of Jacobsthal sequence A001045, pairs with even and odd indices swapped.at n=30A140505
• Jacobsthal numbers A001045, every second term incremented by 1.at n=31A155944
• Expansion of Sum_{k>=1} x^k/(1 - x^k - 2*x^(2*k)).at n=30A309729
• Sum of the divisors of A001045(n) (Jacobsthal numbers).at n=30A366772
• Number of non-colorable strings of length n considered by the alternating coloring function.at n=32A378105