298775

Appears in sequences

• Nonsquarefree "year numbers" (numbers n such that phi(n) = 2*phi(sigma(n)): A137815).at n=13A137816
• Number of length n+3 0..4 arrays with no four elements in a row with pattern abba (possibly a=b) and new values 0..4 introduced in 0..4 order.at n=7A243029