-2340

Appears in sequences

• Partition function coefficients for square lattice spin 3/2 Ising model.at n=32A010110
• Low-temperature magnetization expansion for square lattice (Potts model, q=3).at n=13A057374
• Triangle T(n,k) read by rows: consider the sequence a(m) = a(m-1) + sum_{0<j<=m/n} a(m-j*n) with a(0)=1. Row n of T(n,k) is formed by the coefficients of the recurrence relation of sequence b(i) = a(n*i).at n=52A113445
• a(n) = 2n(19-n).at n=45A182428
• Coefficients in the expansion of ([s] + [2s]x + [3s]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(3), s = r/(1-r).at n=26A279630
• Expansion of e.g.f. sec(log(1 + x)) + tan(log(1 + x)).at n=8A306336
• Expansion of Sum_{k>=1} k * x^k * (1 - x^k) / (1 + x^k)^3.at n=35A326238
• a(n) = Sum_{k=0..floor(n/4)} (-1)^k * binomial(n+3,4*k+3) * Catalan(k).at n=11A360050
• Expansion of Sum_{k>0} k^2 * x^k/(1 + x^k)^3.at n=51A364351
• The unique sequence such that Sum_{d|n} d*a(d)^(n/d) = sigma(n)^2 for every n.at n=13A383614