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

A243726

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

Terms

    a(0) =3a(1) =6a(2) =12a(3) =25a(4) =53a(5) =116a(6) =259a(7) =594a(8) =1389a(9) =3323a(10) =8095a(11) =20113a(12) =50814a(13) =130631a(14) =341024a(15) =904241a(16) =2431805a(17) =6632342a(18) =18324521a(19) =51272228a(20) =145153079a(21) =415580431a(22) =1202307183a(23) =3512796459a(24) =10356995364a(25) =30795038625a(26) =92273776218a(27) =278450451781

External references