2539018

Appears in sequences

• Numbers k for which the set {30*k-13, 30*k-11, 30*k-7, 30*k-1, 30*k+1, 30*k+7, 30*k+11, 30*k+13} forms a symmetrical prime octuplet.at n=7A145315
• Number of nX5 0..1 arrays with every element equal to 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=9A299604