2469601

Appears in sequences

• 18-hyperperfect numbers: n = 18*(sigma(n)-n-1) + 1.at n=2A028501
• a(n) = n^5 - n^3 + n^2.at n=19A133071
• Nonsemiprime hyperperfect numbers.at n=13A133447
• a(n) = p^5 - p^3 + p^2, where p = prime(n).at n=7A135180