22369622

Appears in sequences

• a(2*n) = 2*a(2*n-1), a(2*n+1) = 2*a(2*n)-1.at n=26A005578
• a(n) = a(n-1) + 2*a(n-2) with a(0)=0, a(1)=2.at n=25A014113
• a(n) = C(n,1) + C(n,4) + ... + C(n, 3*floor(n/3) + 1).at n=25A024494
• a(n) = (4^n + 2)/3.at n=13A047849
• Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=25A052953
• Expansion of (1 - x)/((1 + x)*(1 - 2*x)).at n=26A078008
• a(n)*a(n+3) - a(n+1)*a(n+2) = 2^n, given a(0)=1, a(1)=2, a(2)=2.at n=26A080880
• Size of "uniform" Hamming covers of distance 1, that is, Hamming covers in which all vectors of equal weight are treated the same, included or excluded from the cover together.at n=25A081374
• Generalized multiplicative Jacobsthal sequence.at n=26A087464
• Generalized Jacobsthal sequence.at n=25A087628
• Expansion of (1+4x+x^2-10x^3)/((1-x)(1-x-2x^2)).at n=23A093380
• Pair reversal of a Jacobsthal sequence.at n=27A094359
• Expansion of -2*x*(-3-2*x+4*x^2) / ((x-1)*(2*x+1)*(2*x-1)*(1+x)).at n=23A120462
• Jacobsthal numbers(A001045) + 1.at n=26A128209
• a(n+3) = 3*(a(n+2) - a(n+1)) + 2*a(n).at n=26A130707
• a(n)= -3a(n-1) -3a(n-2)-2a(n-3), a(0)=1, a(1)=-2, a(2)=2.at n=26A131562
• A024494 prefixed by a 0.at n=26A131708
• Second trisection of A024494.at n=8A132397
• Row sums of triangle A135230.at n=25A135231
• Interleaving of A002450(n), A002450(n) + 1.at n=27A136324