587520

Appears in sequences

• Expansion of log(1+x)*log(1+tanh(x)).at n=10A009423
• Value of phi in arithmetic progression of at least 5 terms having the same value of phi in A050515.at n=13A050517
• Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and positive determinant.at n=15A211148
• Number of (n+2) X 4 0..1 matrices with each 3 X 3 subblock idempotent.at n=25A224553
• Numbers m with a divisor d such that tau(d) * sigma(d) = m.at n=26A331668
• Numbers m such that A357761(m) < A357761(k) for all k < m.at n=25A357764
• G.f.: Product_{k >= 0} ((1 + x^(2*k+1)) / (1 - x^(2*k+1)))^k.at n=45A361008