60788

Appears in sequences

• Number of ways of folding a 2 X n strip of stamps.at n=7A001415
• Expansion of (1+x^4*C^2)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=10A071747
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 213", based on the 5-celled von Neumann neighborhood.at n=7A270902
• The PI index of the Aztec diamond AZ(n) (see the Imran et al. reference).at n=6A292343