Number of ways to color vertices of a 9-gon using <= n colors, allowing only rotations.

A054623

Number of ways to color vertices of a 9-gon using <= n colors, allowing only rotations.

Terms

    a(0) =0a(1) =1a(2) =60a(3) =2195a(4) =29144a(5) =217045a(6) =1119796a(7) =4483815a(8) =14913200a(9) =43046889a(10) =111111340a(11) =261994491a(12) =573309320a(13) =1178278205a(14) =2295672484a(15) =4271485135a(16) =7635498336a(17) =13176431825a(18) =22039922460a(19) =35854190179a(20) =56888890680a(21) =88253340581a(22) =134141026580

External references