Number of endofunctions f on [n] such that f^7(i) = f(i) for all i in [n].
A245503
Number of endofunctions f on [n] such that f^7(i) = f(i) for all i in [n].
Terms
- a(0) =1a(1) =1a(2) =4a(3) =21a(4) =142a(5) =1131a(6) =10422a(7) =112015a(8) =1396516a(9) =19702665a(10) =306547426a(11) =5177584809a(12) =94168757916
External references
- oeis: A245503