-850

Appears in sequences

• Expansion of (9*phi(q)*phi(q^3)^5 - phi(q)^5*phi(q^3))/8 in powers of q where phi(q) is a Ramanujan theta function.at n=26A113261
• Expansion of (1/3) * b(q) * b(q^2) * c(q)^2 / c(q^2) in powers of q where b(), c() are cubic AGM functions.at n=26A132000
• a(n) = 5*(-1)^n*A078008(n).at n=9A156550
• Expansion of eta(q)^5 * eta(q^3) * eta(q^6)^4 / eta(q^2)^4 in powers of q.at n=25A214262
• Difference between sums of quadratic residues and non-residues modulo n that are coprime to n.at n=74A255643
• Expansion of (1/(1 + x)) * Product_{k>=1} 1/(1 - k*x^k/(1 + x)^k).at n=9A307258
• a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^2.at n=25A321558
• Triangle read by rows where row m is the m-th Gilbreath polynomial and column n is the numerator of the coefficient of the n-th degree term.at n=30A347924
• Dirichlet inverse of A358764.at n=48A359427
• Expansion of 1 / Sum_{k in Z} x^(2*k) / (1 - x^(5*k+2)).at n=32A375061
• a(n) = 2*sigma(n) - sigma(A003961(n)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1).at n=71A378752
• Dirichlet convolution of A276086 (primorial base exp-function) with A055615 (Dirichlet inverse of n).at n=59A383286