337600

Appears in sequences

• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=31A207449
• E.g.f. satisfies: A'(x) = A(x)^7 * A(-x)^5 with A(0) = 1.at n=7A236958
• Number of primes p of the form k^2 + 1 less than 10^n such that p+2 and 2p+1 are also primes.at n=19A356364
• Number of ways of tiling the n X n torus up to diagonal and antidiagonal reflections of the square by a tile that is fixed under only 180-degree rotations.at n=4A368141
• Number of ways of tiling the n X n torus up to 90-degree rotations of the square by a tile that is fixed only under 180-degree rotation of the square.at n=4A368144
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal and vertical reflections by a tile that is fixed under 180-degree rotations but not horizontal or vertical reflections.at n=40A368303