72620

Appears in sequences

• Number of ways to place 3 nonattacking zebras on a 3 X n board.at n=25A172221
• Least positive integer k such that prime(prime(k)), prime(prime(k*n)), prime(p) and prime(q) form a 4-term arithmetic progression for some pair of primes p and q.at n=43A261462
• Number of nX6 0..1 arrays with every element equal to 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=7A298893