846649344

Appears in sequences

• a(n+2) = 2*a(n+1) + 2*a(n); a(0) = -1, a(1) = 1.at n=23A028860
• a(n)*a(n+3) - a(n+1)*a(n+2) = 2^n, given a(0) = 1, a(1) = 1, and a(2) = 1.at n=23A080876
• Expansion of g.f. (1-2*x^2)/(1-2*x-2*x^2).at n=21A152035
• Expansion of 2*x^2 / (1-2*x-2*x^2).at n=22A293007