91409

Appears in sequences

• Number of length n+3 0..5 arrays with no four elements in a row with pattern abab (with a!=b) and new values 0..5 introduced in 0..5 order.at n=6A243041
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 1, a(1) = 3, a(2) = 4, a(3) = 5.at n=27A295718