34838

Appears in sequences

• Numbers k such that 9*10^k + 7 is prime.at n=27A096774
• Number of polyominoes consisting of n regular unit 9-gons.at n=7A103467
• Number of polyominoes consisting of 8 regular unit n-gons.at n=6A120102
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.at n=8A145932
• a(1) = 2; a(n) is twice the previous term if it is prime, otherwise the previous term minus its lowest prime factor plus one.at n=41A180625
• Number of (3+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=31A252722
• Number of (2+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=38A258555