Number of permutations avoiding 321 of length 3n composed of only 3-cycles.
A350665
Number of permutations avoiding 321 of length 3n composed of only 3-cycles.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =60a(4) =388a(5) =2606a(6) =17890a(7) =124512a(8) =874562a(9) =6182198a(10) =43903044a(11) =312843918a(12) =2235028210a(13) =15999423988a(14) =114710881886a(15) =823463493632
External references
- oeis: A350665