1398102

Appears in sequences

• a(2*n) = 2*a(2*n-1), a(2*n+1) = 2*a(2*n)-1.at n=22A005578
• a(n) = a(n-1) + 2*a(n-2) with a(0)=0, a(1)=2.at n=21A014113
• a(n) = C(n,2) + C(n,5) + ... + C(n, 3*floor(n/3)+2).at n=22A024495
• a(n) = (4^n + 2)/3.at n=11A047849
• Expansion of 2*(1-x-x^2)/((1-x)*(1+x)*(1-2*x)).at n=21A052953
• a(n) = ceiling(2^(n+1)/n).at n=23A053639
• Expansion of (1 - x)/((1 + x)*(1 - 2*x)).at n=22A078008
• Expansion of (1-x)/(1+x+2*x^2+2*x^3).at n=44A078052
• 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=22A080880
• a(n) = 2^n - A081374(n).at n=20A083322
• Binomial transform of (-1)^mod(n,3) (A257075).at n=22A086953
• Generalized multiplicative Jacobsthal sequence.at n=22A087464
• Expansion of (1+4x+x^2-10x^3)/((1-x)(1-x-2x^2)).at n=19A093380
• Pair reversal of a Jacobsthal sequence.at n=23A094359
• Numbers k such that A003313(k) = A003313(9*k).at n=5A116463
• Expansion of -2*x*(-3-2*x+4*x^2) / ((x-1)*(2*x+1)*(2*x-1)*(1+x)).at n=19A120462
• Jacobsthal numbers(A001045) + 1.at n=22A128209
• a(n) = ceiling(4^n/n).at n=11A129788
• A trisection of A024495.at n=7A132804
• a(2n) = A001045(n); a(1)=1; a(2n+1) = 2*A001045(n-1) for n >= 1.at n=45A133684