31704

Appears in sequences

• Expansion of (1-x^8) / (1-x)^8.at n=11A008490
• The 28-cycle of the n => sigma(n)-n process, where sigma(n) is the sum of divisors of n (A000203).at n=2A072890
• Conjectured list of sociable numbers.at n=11A122726
• Number of -n..n arrays x(0..3) of 4 elements with zero sum and elements alternately strictly increasing and strictly decreasing.at n=23A200058
• Conjectured list of numbers which are perfect, amicable, or sociable.at n=31A347770