Number of length n+2 0..7 arrays with no three equal elements in a row and new values 0..7 introduced in 0..7 order.

A242470

Number of length n+2 0..7 arrays with no three equal elements in a row and new values 0..7 introduced in 0..7 order.

Terms

    a(0) =4a(1) =12a(2) =41a(3) =159a(4) =685a(5) =3233a(6) =16533a(7) =90817a(8) =531812a(9) =3295779a(10) =21456363a(11) =145645809a(12) =1023308083a(13) =7391587656a(14) =54563960012a(15) =409583330514

External references