Number of chiral pairs of a row of n colors using 6 or fewer colors.
A320524
Number of chiral pairs of a row of n colors using 6 or fewer colors.
Terms
- a(0) =0a(1) =15a(2) =90a(3) =630a(4) =3780a(5) =23220a(6) =139320a(7) =839160a(8) =5034960a(9) =30229200a(10) =181375200a(11) =1088367840a(12) =6530207040a(13) =39181942080a(14) =235091652480
External references
- oeis: A320524