19100

Appears in sequences

• a(n+2) = 7*a(n+1) - 7*a(n) - 9*n; a(n+4) = 9*a(n+3) - 22*a(n+2) + 21*a(n+1) - 7*a(n).at n=7A030429
• Sum of the first n twin prime pairs.at n=31A086169
• Numbers m such that m^2 + 3^k is prime for k = 1, 2, 3.at n=29A177173
• Number of 3X3 0..n arrays with each 2X2 subblock determinant nonzero and the array of 2X2 subblock determinants symmetric under 90 degree rotation.at n=9A187529
• Number of ways to place 6 nonattacking grasshoppers on a toroidal chessboard of size n x n.at n=4A190401
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 526", based on the 5-celled von Neumann neighborhood.at n=39A272744
• Non-palindromic numbers n such that n * reverse(n) is a square and n and reverse(n) do not have the same number of digits.at n=30A322835
• Number of integer partitions of n without choosable initial intervals.at n=37A387118