-1872

Appears in sequences

• Coefficients in expansion of Eisenstein series E_2 (also called E_1 or G_2).at n=45A006352
• Magnetic susceptibility coefficients for square lattice spin 2 Ising model.at n=22A010116
• Magnetic susceptibility coefficients for square lattice spin 3 Ising model.at n=34A010117
• Magnetic susceptibility coefficients for square lattice spin 3/2 Ising model.at n=16A010118
• Magnetic susceptibility coefficients for square lattice spin 5/2 Ising model.at n=28A010119
• Expansion of (1-x)^(-1)/(1+x-2*x^2+x^3).at n=11A077899
• Expansion of theta_4(q)^4 - theta_2(q)^4, where theta_2 and theta_4 are the Jacobi theta series.at n=45A103640
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A202869; by antidiagonals.at n=21A202870
• Expansion of (phi(-q)^3 / phi(-q^3))^2 in powers of q where phi() is a Ramanujan theta function.at n=33A229616
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 43", based on the 5-celled von Neumann neighborhood.at n=25A269879
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 243", based on the 5-celled von Neumann neighborhood.at n=25A271003
• Main diagonal of A292131.at n=9A292132
• a(n) = A033879(A276086(n)).at n=27A324654
• E.g.f.: 1 / (1 - x * exp(-2*x)).at n=6A336959
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * Sum_{j=0..n} (-k * (n-j))^j/j!.at n=42A351791
• Expansion of Sum_{k>0} k * x^k/(1 + x^k)^3.at n=51A364343
• Expansion of g.f. A(x) = G( x*(1 + 3*x)*G(x)^2 )^(1/3) = G( x^2*(1 + 5*x)*G(x)^3 )^(1/5), where G(x) is the g.f. of A370533.at n=7A370534