13508880

Appears in sequences

• Numbers that can be expressed as the difference of the squares of primes in exactly twenty-one distinct ways.at n=16A092017
• Let G denote the 9-node, 16-edge graph formed from an octagon with main diagonals drawn and a node at the center; a(n) = number of magic labelings of G with magic sum 2n.at n=15A244867