611669

Appears in sequences

• a(n) = 2*a(n-1) - (-1)^n for n > 0, a(0)=2.at n=18A062092
• Numbers k such that A081252(m)/m^2 has a local minimum for m = k.at n=18A081253
• Expansion of (1+x-x^2)/((1-x)*(1-4*x^2)).at n=19A097163
• A007318^(-1) * A133648.at n=18A133649
• a(n) = a(n-1) + 4a(n-2) - 4a(n-3).at n=19A136326
• a(n) = (7*4^n - 1)/3.at n=9A206374
• Expansion of (1+2*x+3*x^2-x^3)/((1-x)*(1+x)*(1-2*x)*(1+2*x)).at n=19A221049
• a(0) = 2, a(1) = 2; for n > 1, a(n) = a(n-1) + 2*a(n-2) + 3.at n=18A290604