26458

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 97.at n=15A020436
• a(n) is root of square starting with digit 7: first term of runs.at n=6A035074
• Numbers k such that 20*R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=20A056656
• Nonnegative numbers n such that 6*2^n-1 is prime.at n=35A164523
• Number of nX6 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=4A302365
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=49A302367
• Number of 5Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=5A302371
• Triangle read by rows: T(m,n) (m >= n >= 1) = number of edges formed by drawing the line segments connecting any two of the (m+1) X (n+1) lattice points in an m X n grid of squares and extending them to the boundary of the grid.at n=30A333283