-3861

Appears in sequences

• a(n) = 6*a(n-1) - 9*a(n-2) + 3*a(n-3).at n=6A216757
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 123", based on the 5-celled von Neumann neighborhood.at n=33A270213
• Expansion of Product_{k>=1} (1 + x^(3*k))^(3*k) / (1 + x^k)^k.at n=32A285294
• Expansion of e.g.f. Product_{k>=1} exp(1 - exp(x^k/k)).at n=10A346057