Number of compositions of n into distinct parts where each part i is marked with a word of length i over a quaternary alphabet whose letters appear in alphabetical order.
A261842
Number of compositions of n into distinct parts where each part i is marked with a word of length i over a quaternary alphabet whose letters appear in alphabetical order.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =100a(4) =195a(5) =736a(6) =6032a(7) =11712a(8) =35285a(9) =100260a(10) =871386a(11) =1492820a(12) =4438573a(13) =10525720a(14) =29825140a(15) =241360728a(16) =405645867a(17) =1086289116a(18) =2489722574a(19) =6158961820a(20) =14573822743a(21) =123303661384a(22) =192326074572a(23) =504783599080
External references
- oeis: A261842