Number of length n+2 0..6 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..6 introduced in 0..6 order.

A243725

Number of length n+2 0..6 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..6 introduced in 0..6 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) =20112a(12) =50805a(13) =130560a(14) =340597a(15) =901889a(16) =2420157a(17) =6577868a(18) =18083951a(19) =50250422a(20) =140966749a(21) =398896687a(22) =1137446947a(23) =3265711480a(24) =9432563169a(25) =27389067476a(26) =79894802085a(27) =233989828069a(28) =687661244273

External references