340918784

Appears in sequences

• Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1/2 - 2*x^2 + x^4).at n=32A030435
• a(n) = (2 + sqrt(2))^n + (2 - sqrt(2))^n.at n=16A056236
• Number of meaningful differential operations of the k-th order on the space R^12.at n=28A129639
• a(0) = 4; for n>0, a(n) = a(n-1)^2 - 2^(1+2^(n-1)).at n=4A152121