50306

Appears in sequences

• Sum of first n squares of semiprimes.at n=25A217736
• Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock summing to a prime and those sums nondecreasing in every row and column.at n=6A251460
• Number of (n+1)X(7+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.at n=0A251466
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.at n=21A251467
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column.at n=27A251467
• On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that an (n,n+1) leaper reaches before getting trapped, or -1 if it never gets trapped.at n=35A343179