243760

Appears in sequences

• The 28-cycle of the n => sigma(n)-n process, where sigma(n) is the sum of divisors of n (A000203).at n=15A072890
• Conjectured list of sociable numbers.at n=20A122726
• Number of planar n X n X n binary triangular grids with every one adjacent to exactly 2 other ones.at n=9A153989
• Integers k such that k = Sum k/(p_i + j), where p_i are the prime factors of k (with multiplicity). Case j = 3.at n=14A380924