Number of words on {1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,...,n,n,n,n} avoiding the pattern 12345.
A266741
Number of words on {1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,...,n,n,n,n} avoiding the pattern 12345.
Terms
- a(0) =1a(1) =1a(2) =70a(3) =34650a(4) =63063000a(5) =142951955371
External references
- oeis: A266741