-2163

Appears in sequences

• Expansion of Product_{m>=1} ((1+q^(2*m-1))/(1+q^(2*m)))^7.at n=15A029844
• Expansion of psi(x^3) / psi(x) in powers of x where psi() is a Ramanujan theta function.at n=47A101195
• a(0)=1; thereafter a(n) = -3*Sum_{k=1..n} binomial(2n,2k)*a(n-k).at n=3A210676
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood.at n=27A269875
• Dirichlet g.f.: zeta(s-1) / (zeta(s) * zeta(s-2)).at n=46A328502