Number of triples of permutations on n letters such that for each j, exactly one of the permutations fixes j and the other two have the same image on j.
A137775
Number of triples of permutations on n letters such that for each j, exactly one of the permutations fixes j and the other two have the same image on j.
Terms
- a(0) =1a(1) =0a(2) =3a(3) =6a(4) =45a(5) =252a(6) =1935a(7) =16146a(8) =153657a(9) =1616760a(10) =18699579a(11) =235498590a(12) =3207570597a(13) =46968796404a(14) =735689606535
External references
- oeis: A137775