40215

Appears in sequences

• Odd numbers with exactly 4 distinct palindromic prime factors.at n=18A046406
• a(1) = 3, a(n) = a(n-1) + 4*(a(n-1)-floor(a(n-1)^(1/3))^3).at n=24A096297
• a(n) = (n+1)! - (n)!!.at n=7A127111
• Integers of the form 8k + 7 that can be written as a sum of four distinct squares of the form m, m + 1, m + 3, m + 5, where m == 2 (mod 4).at n=24A243580
• Near 2-hyperperfect numbers: numbers k such that sigma(k) - 3*k/2 - 1/2 is a proper divisor of k.at n=15A305616