90768

Appears in sequences

• Numbers k such that sigma(k) divides k^2.at n=33A090777
• Weight distribution of [124,62,20] double circulant code.at n=10A131353
• a(n) = 2^n*Product_{k=1..floor((n-1)/2)} (1 + 2*cos(k*Pi/n)^2 + 4*cos(k*Pi/n)^4).at n=15A152090
• Integers n such that A249670(n) = n.at n=3A249671
• Numbers whose sum of divisors is the square of one of their divisors.at n=7A303123