31211

Appears in sequences

• Discriminants of totally complex sextic fields (negated).at n=30A023687
• n written in fractional base 5/3.at n=36A024633
• Number of points in N^4 of norm <= n.at n=17A055403
• Scaled convolution of (n^3)*A000984(n) with A000984(n).at n=22A142962
• Composite numbers whose product of digits is 6.at n=35A201055
• Numbers that eventually reach 1 under "x -> sum of 4th power of digits of x".at n=23A219111
• Integers n such that core(n), core(n+1), core(n+2) are smaller than n^(1/2) where core(n) is A007913(n), the squarefree part of n.at n=2A260212
• a(n) is the number of regions formed by n-secting the angles of a decagon.at n=38A335800
• Starts of runs of 3 consecutive numbers whose powerful part is larger than their powerfree part (A328014).at n=4A348120
• The smallest of 3 consecutive integers such that the first is divisible by the square of a prime, the second is divisible by the cube of a prime, and the third is divisible by the fourth power of a prime.at n=21A349952