-2157

Appears in sequences

• Coefficients of expansion of:p(t,y)=-Exp[t/4]/(-2 + y*Exp[t/4] + y*Exp[3*t/4]).at n=23A171770
• The sequence of coefficients of cubic polynomials p(x-n), where p(x) = x^3 - 3*x + 1.at n=55A218332
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 403", based on the 5-celled von Neumann neighborhood.at n=31A271810
• Expansion of Product_{k>=1} (1 - (x*(1 + x))^k).at n=19A309575
• Expansion of Product_{k>=1} 1/(1 + x^k)^(k-1).at n=36A319109
• E.g.f. A(x) satisfies A(x) = 1 + 3 * (1 - exp(-x)) * A(1 - exp(-x)).at n=5A355094