235520

Appears in sequences

• Expansion of 1/(1 - 2*x + 2*x^2 - 2*x^3).at n=29A077943
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 229", based on the 5-celled von Neumann neighborhood.at n=8A270947
• a(n) = A000196(A277699(A277807(n))).at n=24A277806
• Least b such that b^(2^n) + 1 is a Proth prime (A080076).at n=10A334053