450840

Appears in sequences

• Theta series of A*_16 lattice.at n=50A023928
• Numbers m such that DivisorSigma(4*k-2, m) mod m = 0 holds presumably for all k; that is, (4k-2)-power-sums of divisors of m are divisible by m for all k.at n=33A066290
• Numbers k such that sigma_2(k)*sigma_1(k)/sigma_0(k) is a perfect square.at n=28A152218
• Expansion of the continued fraction 1 / (1-q-q^2 / (1-q-q^2-q^3 / (1-q-q^2-q^3-q^4 / (...)))).at n=16A355043