127255

Appears in sequences

• Number of length n+3 0..3 arrays with no four elements in a row with pattern abab (with a!=b) and new values 0..3 introduced in 0..3 order.at n=7A243039
• T(n,k)=Number of length n+3 0..k arrays with no four elements in a row with pattern abab (with a!=b) and new values 0..k introduced in 0..k order.at n=52A243044
• Number of Motzkin paths of length n with all ascents ending at even heights.at n=17A299270