106312

Appears in sequences

• Numbers k such that phi(k) + phi(k+1) divides sigma(k) + sigma(k+1).at n=37A067282
• Numbers n such that (i) the largest prime factor of n is not a palindrome and (ii) the sum of the factorials of the digits of n is equal to the largest prime factor of n reversed.at n=22A074301
• Let f(k) denote the largest prime factor of k which is not a palindrome. Sequence gives numbers k such that the sum of the factorials of the digits of k is equal to f(k) reversed.at n=22A111185
• Number of ways to arrange 2 nonattacking knights on the lower triangle of an n X n board.at n=29A194486