47932

Appears in sequences

• Number of 4-noncrossing stack-free partial matching without 1-arcs.at n=11A143657
• Eight bishops and one elephant on a 3 X 3 chessboard: a(n) = 3*2^n - 2*F(n+1), with F(n) = A000045(n).at n=14A175657
• Number of partitions of n with difference -5 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=50A242687
• Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.at n=5A251080
• Number of (n+1) X (6+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.at n=5A251086
• Composite numbers k such that phi(k) * psi(k) + 1 is a perfect square, where phi is the Euler totient function (A000010) and psi is the Dedekind psi function (A001615).at n=42A309653