Number of achiral colorings of the 6 square faces of a cube or the 6 vertices of a regular octahedron using n or fewer colors.

A337898

Number of achiral colorings of the 6 square faces of a cube or the 6 vertices of a regular octahedron using n or fewer colors.

Terms

    a(0) =1a(1) =10a(2) =55a(3) =200a(4) =560a(5) =1316a(6) =2730a(7) =5160a(8) =9075a(9) =15070a(10) =23881a(11) =36400a(12) =53690a(13) =77000a(14) =107780a(15) =147696a(16) =198645a(17) =262770a(18) =342475a(19) =440440a(20) =559636a(21) =703340a(22) =875150a(23) =1079000a(24) =1319175a(25) =1600326a(26) =1927485a(27) =2306080a(28) =2741950a(29) =3241360

External references