34473

Appears in sequences

• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11000-01111-11000 pattern in any orientation.at n=17A147458
• Number of (n+3) X 6 0..2 matrices with each 4 X 4 subblock idempotent.at n=12A224723
• Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=9A303193
• a(n) is the least semiprime > a(n-2) + a(n-1), with a(1) = 4 and a(2) = 6.at n=18A366217