75825

Appears in sequences

• Numbers which are both lucky and pentagonal.at n=17A128511
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.at n=12A147028
• a(n) = n^2*(3*n^2 - 1)/2.at n=15A260810
• Number of n X n 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=8A302157