-668

Appears in sequences

• Expansion of q^(-1/2) * (eta(q) * eta(q^2))^4 in powers of q.at n=29A030211
• Expansion of theta_3(q) / theta_3(q^2) in powers of q.at n=22A080015
• Omit first term from A160534 and divide by 7.at n=58A160535
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j)=(i if i=j and 1 otherwise) (A204125).at n=21A204126
• Expansion of phi(-q) / phi(q^2) in powers of q where phi() is a Ramanujan theta function.at n=22A210030
• Expansion of phi(q^2) / phi(q) in powers of q where phi() is a Ramanujan theta function.at n=11A210065
• Expansion of q^(-1) * (f(-q^3, -q^5) / f(-q, -q^7))^2 in powers of x where f(,) is Ramanujan's two-variable theta function.at n=45A245436
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 157", based on the 5-celled von Neumann neighborhood.at n=13A270332
• E.g.f. satisfies: A(x) * log(A(x)) = 1 - exp(-x*A(x)^2).at n=5A349602
• Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=1..n} (-1)^j*j^k*floor(n/j).at n=38A366936