Number of length n+2+2 0..2 arrays with every value 0..2 appearing at least once in every consecutive 2+3 elements, and new values 0..2 introduced in order.
A242317
Number of length n+2+2 0..2 arrays with every value 0..2 appearing at least once in every consecutive 2+3 elements, and new values 0..2 introduced in order.
Terms
- a(0) =25a(1) =61a(2) =145a(3) =337a(4) =781a(5) =1829a(6) =4269a(7) =9957a(8) =23233a(9) =54225a(10) =126533a(11) =295265a(12) =689021a(13) =1607877a(14) =3752057a(15) =8755625a(16) =20431737a(17) =47678569a(18) =111260509a(19) =259632437a(20) =605866385a(21) =1413822053a(22) =3299230409a(23) =7698933081a(24) =17965877829a(25) =41924350093a(26) =97832744293
External references
- oeis: A242317