-1456

Appears in sequences

• Expansion of log(1+tanh(tan(x))).at n=8A009386
• Result of using the perfect squares as coefficients in an infinite polynomial series in x and then expressing this series as (1+a(1)x)(1+a(2)x^2)(1+a(3)x^3)...at n=13A147559
• Triangular array, inverse of 2*P - I, where P is Pascal's triangle and I is the identity matrix.at n=41A162312
• Series reversion of x + 2*x^2 + x^4.at n=5A217362
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 20", based on the 5-celled von Neumann neighborhood.at n=54A269714
• Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = 4/3.at n=21A279675
• a(n) = n^3 * Sum_{d|n} (-1)^(n/d + 1) * mu(d) / d^3.at n=11A338548