64268

Appears in sequences

• G.f.: Sum_{n>=0} Product_{k=1..n} Series_Reversion( x/(1 + x^k) ).at n=22A206290
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood.at n=7A270084
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 323", based on the 5-celled von Neumann neighborhood.at n=7A271254
• Expansion of Product_{k>=1} (1 + (1 + x + x^2) * x^k).at n=36A309173