Number of compositions of n where each part i is marked with a word of length i over a quaternary alphabet whose letters appear in alphabetical order and all four letters occur at least once in the composition.
A293581
Number of compositions of n where each part i is marked with a word of length i over a quaternary alphabet whose letters appear in alphabetical order and all four letters occur at least once in the composition.
Terms
- a(0) =75a(1) =1232a(2) =13064a(3) =114032a(4) =893490a(5) =6550112a(6) =45966744a(7) =313094512a(8) =2088274012a(9) =13719804224a(10) =89151186688a(11) =574612403008
External references
- oeis: A293581