281472

Appears in sequences

• Expansion of 1/((1-2x)(1-4x)(1-5x)(1-9x)).at n=5A025961
• Average (scaled by a certain explicit factor) over all integers k of a_k(n), the n-th coefficient of the k-th cyclotomic polynomial.at n=15A086811
• Number of (n+1) X 7 0..1 arrays with the number of clockwise edge increases in every 2 X 2 subblock differing from each horizontal or vertical neighbor.at n=19A205191