Number of length n+3+2 0..3 arrays with every value 0..3 appearing at least once in every consecutive 3+3 elements, and new values 0..3 introduced in order.
A242318
Number of length n+3+2 0..3 arrays with every value 0..3 appearing at least once in every consecutive 3+3 elements, and new values 0..3 introduced in order.
Terms
- a(0) =65a(1) =185a(2) =503a(3) =1316a(4) =3398a(5) =8801a(6) =23069a(7) =60197a(8) =156887a(9) =408962a(10) =1066514a(11) =2781611a(12) =7253453a(13) =18914369a(14) =49323167a(15) =128621684a(16) =335409314a(17) =874649537a(18) =2280834353a(19) =5947765493a(20) =15510073823a(21) =40445831522a(22) =105471145814a(23) =275038567523
External references
- oeis: A242318