22347

Appears in sequences

• Numbers k such that phi(sigma(k)+k) = sigma(k).at n=16A068366
• Pair the odd numbers such that the k-th pair is (r, r+2k) where r is the smallest odd number not included earlier: (1, 3), (5, 9), (7, 13), (11, 19), (15, 25), (17, 29), (21, 35), (23, 39), (27, 45), ... This is the sequence of the product of the members of pairs.at n=36A075320
• Number of nonprime parts in the last section of the set of partitions of n.at n=35A144121
• Nonnegative integers m such that 10*m*(m+1)+1 is a square.at n=6A222390
• Numbers k such that k and k+1 are both hoax numbers (A019506).at n=36A329935