Number of ways to color vertices of a 9-gon using <= n colors, allowing rotations and reflections.
A060561
Number of ways to color vertices of a 9-gon using <= n colors, allowing rotations and reflections.
Terms
- a(0) =0a(1) =1a(2) =46a(3) =1219a(4) =15084a(5) =110085a(6) =563786a(7) =2250311a(8) =7472984a(9) =21552969a(10) =55605670a(11) =131077771a(12) =286779076a(13) =589324749a(14) =1148105154a(15) =2136122255a(16) =3818273456a(17) =6588925841a(18) =11020906014a(19) =17928333139a(20) =28446045340a(21) =44128712341a(22) =67073090106
External references
- oeis: A060561