Squarefree part of the total number of arrangements of a set with n elements.
A222637
Squarefree part of the total number of arrangements of a set with n elements.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =1a(4) =65a(5) =326a(6) =1957a(7) =137a(8) =109601a(9) =986410a(10) =9864101a(11) =27126278a(12) =7704505a(13) =16926797486a(14) =236975164805a(15) =888656868019
External references
- oeis: A222637