-1415

Appears in sequences

• Expansion of tan(x)/cosh(tan(x)).at n=4A009762
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 489", based on the 5-celled von Neumann neighborhood.at n=27A272513
• G.f.: Sum_{n>=0} (2*n+1) * x^n * (1 - x^n)^n.at n=32A326607
• G.f. A(x) satisfies [x^(2*n)] A(x)^(3*n) = -3 and [x^(2*n+1)] A(x)^(3*n+1) = [x^(2*n+1)] A(x)^(3*n+2) for n >= 1.at n=6A376225
• E.g.f. A(x) satisfies A(x) = 1 + sin(x*A(x)) / A(x).at n=9A381180