21164

Appears in sequences

• Number of triangles a queen can make (starting anywhere) on an n X n board.at n=22A030117
• Dirichlet convolution of b_n=1 with Bell numbers.at n=9A034732
• Number of nonnegative integer 3 X 3 matrices with sum of elements equal to n, under row and column permutations.at n=16A052365
• Indices k where A057176(k) = 2.at n=17A086809
• Numbers n with property that for each single digit d of n, we can also see the decimal expansion of 2^d as a substring of n. Also n may not contain any zero digits.at n=13A135016
• Numbers k such that k and k+1 have 4 distinct prime factors.at n=31A140078
• Multiples of 5291.at n=4A178027
• Number of collinear point 9-tuples in an n X n cubical grid.at n=12A178261
• Number of 3-step self-avoiding walks on an n X n square summed over all starting positions.at n=42A188148
• Number of 2 X 2 matrices having all elements in {-n,...n} and determinant 4.at n=35A209988
• Number of (n+1) X (6+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=6A234264
• Number of (n+1) X (7+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=5A234265
• Numbers m such that the result of prepending a zero digit to m, removing the least significant digit D, and prepending D, is divisible by m.at n=40A256005
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 307", based on the 5-celled von Neumann neighborhood.at n=28A280979
• Total number of valid hook configurations of permutations of [n].at n=8A318974
• Numbers k such that k and k+1 each have at least 4 distinct prime factors.at n=31A321504
• Number of maximum sized subsets of {1..n} such that every pair of distinct elements has a different difference.at n=55A382395