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 1234.
A266740
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 1234.
Terms
- a(0) =1a(1) =1a(2) =70a(3) =34650a(4) =16140983a(5) =8854463421
External references
- oeis: A266740