Number of length n+4 0..2 arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..2 introduced in 0..2 order.
A244177
Number of length n+4 0..2 arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..2 introduced in 0..2 order.
Terms
- a(0) =38a(1) =108a(2) =306a(3) =867a(4) =2457a(5) =6963a(6) =19732a(7) =55918a(8) =158464a(9) =449066a(10) =1272593a(11) =3606359a(12) =10219940a(13) =28961947a(14) =82074294a(15) =232587601a(16) =659122234a(17) =1867864486a(18) =5293278783a(19) =15000445958a(20) =42509262812a(21) =120465580152a(22) =341383384261a(23) =967434971076
External references
- oeis: A244177