901007

Properties

Appears in sequences

• a(n) = smallest prime number p_k such that 1/p_n + 1/p_{n+1} + ... + 1/p_k > 1.at n=34A119494
• Number of nX5 0..1 arrays with every element equal to 0, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.at n=18A298632
• Prime numbersat n=71349