5592406

Appears in sequences

• a(2*n) = 2*a(2*n-1), a(2*n+1) = 2*a(2*n)-1.at n=24A005578
• a(n) = (8^n + 2*(-1)^n)/3.at n=8A007613
• a(n) = a(n-1) + 2*a(n-2) with a(0)=0, a(1)=2.at n=23A014113
• a(n) = C(n,0) + C(n,3) + ... + C(n,3[n/3]).at n=24A024493
• a(n) = (4^n + 2)/3.at n=12A047849
• Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=23A052953
• Number of functions from {1,2,...,n} to {1,2,...,n} such that the sum of the function values is 0 mod 3.at n=7A068595
• Expansion of (1 - x)/((1 + x)*(1 - 2*x)).at n=24A078008
• 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=24A080880
• 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=23A081374
• a(n) = 2^n - A081374(n).at n=22A083322
• Binomial transform of (-1)^mod(n,3) (A257075).at n=24A086953
• Generalized Jacobsthal sequence.at n=23A087628
• Generalized Jacobsthal sequence.at n=24A087628
• Generalized Jacobsthal sequence.at n=24A087629
• Numbers of the form (4^n + 4^(n-1) + ... + 1) + (n mod 2).at n=10A088556
• Expansion of (1-11x)/((1-x)(1-16x)).at n=6A091881
• Expansion of (1+4x+x^2-10x^3)/((1-x)(1-x-2x^2)).at n=21A093380
• Pair reversal of a Jacobsthal sequence.at n=25A094359
• Numbers k such that A003313(k) = A003313(9*k).at n=22A116463