Number of length n+2 0..9 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..9 introduced in 0..9 order.

A243728

Number of length n+2 0..9 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..9 introduced in 0..9 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) =130632a(14) =341034a(15) =904331a(16) =2432412a(17) =6636111a(18) =18345401a(19) =51381503a(20) =145690844a(21) =418123477a(22) =1213876444a(23) =3563936878a(24) =10577119368a(25) =31722511379a(26) =96106797203a(27) =294036698701

External references