244074

Appears in sequences

• Numbers n such that phi(n) + phi(n+1) = sigma(n)/2.at n=26A076647
• a(n) = 676*n^2 + 2*n.at n=18A158385
• a(n) = 1444*n^2 + 38.at n=13A158766
• a(n) = 169*n^2 + n.at n=37A173275