-4263

Appears in sequences

• Exponential transform of Stirling1 triangle A008275.at n=26A055924
• Expansion of (eta(q)^3*eta(q^10)^6)/(eta(q^2)^2*eta(q^5)^7) in powers of q.at n=31A113977
• G.f.: exp( Sum_{n>=1} A002129(n^2)*x^n/n ), where A002129(n) is the excess of sum of odd divisors of n over sum of even divisors of n.at n=35A225925
• Triangle read by rows. The triangle algorithm applied to (-1)^n/n!.at n=30A363732
• a(n) = Sum_{k=1..n} Sum_{z=1..n} Sum_{y=1..n} Sum_{x=1..n} [GCD(f(x,y,z), n) = k] * f(x,y,z) * A023900(k), where f(x,y,z) = x^2 + y^2 - z^2.at n=6A373582
• Fluctuations of the number of biquadrate integers not exceeding 10^n.at n=34A375247