380407

Appears in sequences

• Rounded down ratio of area of a unit circle and one of the circles inscribed between a regular n-gon and a circumscribed unit circle.at n=36A244094
• Number of length n+4 0..4 arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..4 introduced in 0..4 order.at n=6A244179
• a(n) = Sum_{k=1..n} floor(n/k)^5.at n=12A318744
• Number of digits in the number formed by concatenating the digits of n, n+1, ..., A332584(n), or -1 if A332584(n) = -1.at n=38A332585