66529

Properties

Appears in sequences

• G.f.: -x*(x-1)*(1+x)/(1-x-7*x^2-x^3+x^4).at n=11A171064
• Number of nX5 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 neighboring 1s.at n=8A297428
• Primes p = x^2 + y^2, not of the form z^2 + 1, such that 2^(x^2) == 2^(y^2) == 1 (mod p).at n=13A299103
• Number of skew shapes in a 3 X n rectangle with no empty rows or columns.at n=27A362153
• Prime numbersat n=6633