Number of chiral pairs of colorings of the edges of a regular tetrahedron using n or fewer colors.

A337899

Number of chiral pairs of colorings of the edges of a regular tetrahedron using n or fewer colors.

Terms

    a(0) =0a(1) =1a(2) =21a(3) =140a(4) =575a(5) =1785a(6) =4606a(7) =10416a(8) =21330a(9) =40425a(10) =71995a(11) =121836a(12) =197561a(13) =308945a(14) =468300a(15) =690880a(16) =995316a(17) =1404081a(18) =1943985a(19) =2646700a(20) =3549315a(21) =4694921a(22) =6133226a(23) =7921200a(24) =10123750a(25) =12814425a(26) =16076151a(27) =20001996

External references