89478484

Appears in sequences

• a(n) = a(n-1) + 2*a(n-2) + 2, for n>=3, where a(0)= 1, a(1)= 2, a(2)= 4.at n=26A026644
• Partial sums of Jacobsthal gap sequence.at n=26A080610
• a(n) = (4/3)*(4^n - 1).at n=13A080674
• Expansion of x*(1+2*x)/((1+x)*(1-x)*(1-2*x)).at n=26A084639
• Expansion of (1+x-4*x^2) / ((1+x)*(1-4*x^2)).at n=27A087213
• Expansion of (1 - 2*x + 2*x^2)/((1 - x^2)*(1 - 2*x)).at n=27A097072
• Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).at n=27A097073
• Expansion of (1+3x)/((1-x)(1-4x^2)).at n=25A097164
• Expansion of x^3 / ((x-1)*(2*x-1)*(x^2-x+1)).at n=28A111927
• Expansion of -2*x*(-3-2*x+4*x^2) / ((x-1)*(2*x+1)*(2*x-1)*(1+x)).at n=26A120462
• Second differences of A130624.at n=26A130626
• a(n+3) = 3*(a(n+2) - a(n+1)) + 2*a(n).at n=28A130707
• a(n) = 3a(n-1) - 3a(n-2) + 2a(n-3), a(0) = 3, a(1) = 2, a(2) = 0.at n=28A131370
• a(n)= -3a(n-1) -3a(n-2)-2a(n-3), a(0)=1, a(1)=-2, a(2)=2.at n=28A131562
• a(1)=1, a(n) = a(n-1) + (p-1)*p^(n/2-1) if n is even, else a(n) = a(n-1) + p^((n-1)/2), where p=4.at n=25A133628
• Second differences of Jacobsthal sequence A001045, pairs with even and odd indices swapped.at n=29A140505
• a(n) = (2^n + 2*(-1)^n - 6)/3.at n=28A153772
• Duplicate of A080674.at n=12A155721
• a(n) = 3*a(n-1) -2*a(n-2) -a(n-3) +3*a(n-4) -2*a(n-5) for n > 4, with initial values as shown.at n=28A166022
• a(n) = (2^n - (-1)^n - 3)/3.at n=28A167030