Number of equivalence classes of pairs of permutations in S_n where two pairs are equivalent if they are simultaneously conjugate to each other or simultaneously conjugate to each other after a reversal of one pair.
A327015
Number of equivalence classes of pairs of permutations in S_n where two pairs are equivalent if they are simultaneously conjugate to each other or simultaneously conjugate to each other after a reversal of one pair.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =98a(6) =518a(7) =3096a(8) =23415a(9) =201795a(10) =1973189a(11) =21347935a(12) =253282652a(13) =3263902430
External references
- oeis: A327015