Number of length n+4+1 0..4 arrays with every value 0..4 appearing at least once in every consecutive 4+2 elements, and new values 0..4 introduced in order.
A242235
Number of length n+4+1 0..4 arrays with every value 0..4 appearing at least once in every consecutive 4+2 elements, and new values 0..4 introduced in order.
Terms
- a(0) =15a(1) =35a(2) =71a(3) =139a(4) =271a(5) =531a(6) =1047a(7) =2059a(8) =4047a(9) =7955a(10) =15639a(11) =30747a(12) =60447a(13) =118835a(14) =233623a(15) =459291a(16) =902943a(17) =1775139a(18) =3489831a(19) =6860827a(20) =13488031a(21) =26516771a(22) =52130599a(23) =102486059a(24) =201482287a(25) =396103747a(26) =778719463a(27) =1530922155a(28) =3009713711
External references
- oeis: A242235