Number of strings on n symbols in Stockhausen problem.
A008269
Number of strings on n symbols in Stockhausen problem.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =112a(4) =2921a(5) =126966a(6) =8204497a(7) =735944084a(8) =87394386417
External references
- oeis: A008269