140692

Appears in sequences

• Number of ways of arranging 2n+1 nonattacking queens on a 2n+1 X 2n+1 toroidal board.at n=8A007705
• Number of ways of placing n nonattacking queens on an n X n toroidal chessboard.at n=16A051906
• Indices of primes in sequence defined by A(0) = 17, A(n) = 10*A(n-1) - 13 for n > 0.at n=14A102020
• Number of ways to place n nonattacking nightriders on an n X n toroidal board.at n=16A190393
• The number of 3-length segments in all possible covers of L-length line by these segments with allowed gaps < 3.at n=36A228494