Number of length n+3+1 0..3 arrays with every value 0..3 appearing at least once in every consecutive 3+2 elements, and new values 0..3 introduced in order.
A242234
Number of length n+3+1 0..3 arrays with every value 0..3 appearing at least once in every consecutive 3+2 elements, and new values 0..3 introduced in order.
Terms
- a(0) =10a(1) =22a(2) =43a(3) =82a(4) =157a(5) =304a(6) =586a(7) =1129a(8) =2176a(9) =4195a(10) =8086a(11) =15586a(12) =30043a(13) =57910a(14) =111625a(15) =215164a(16) =414742a(17) =799441a(18) =1540972a(19) =2970319a(20) =5725474a(21) =11036206a(22) =21272971a(23) =41004970a(24) =79039621a(25) =152353768a(26) =293671330a(27) =566069689a(28) =1091134408a(29) =2103229195
External references
- oeis: A242234