21116

Appears in sequences

• Ceiling of Gamma(n + 7/9)/Gamma(7/9).at n=8A020110
• Numbers k such that A109217(k) is prime.at n=13A109218
• Number of partitions with maximum rectangle <= n.at n=15A115725
• Conjectured lower bound for the number of spheres of radius 1 that can be packed in a sphere of radius n.at n=29A121346
• Sums of knight's moves over the square |i|+|j|<=n on infinite chessboard.at n=33A183053
• Number of idempotent 3X3 0..n matrices.at n=39A222822
• Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.at n=5A297715
• T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.at n=33A297720
• Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.at n=2A297725