140698

Appears in sequences

• Numbers n such that sigma(n) - sigma(n-1) divides n.at n=14A227305
• Number of nX3 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.at n=7A268793
• a(n) is the determinant of the 2 X 2 matrix whose entries (when read by rows) are the n-th primes ending in 1, 3, 7, 9 respectively.at n=35A335592