1744597

Properties

Appears in sequences

• Number of n X 7 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=14A300349
• a(n) = number of pairs {x,y} with (x,y > 1) such that x^y (= terms of A072103) has bit length n.at n=44A365930
• Prime numbersat n=131215