Number of length n+2 0..6 arrays with no three equal elements in a row and new values 0..6 introduced in 0..6 order.
A242469
Number of length n+2 0..6 arrays with no three equal elements in a row and new values 0..6 introduced in 0..6 order.
Terms
- a(0) =4a(1) =12a(2) =41a(3) =159a(4) =685a(5) =3232a(6) =16497a(7) =90075a(8) =520248a(9) =3143900a(10) =19678699a(11) =126480319a(12) =828889655a(13) =5508880129a(14) =36980189248a(15) =249999755818
External references
- oeis: A242469