39670362

Appears in sequences

• Number of unrooted regular planar maps of valency 5 with 2n vertices (considered up to orientation-preserving homeomorphisms).at n=3A112949
• Number of unrooted regular odd-valent planar maps with 8 vertices; maps are considered up to orientation-preserving homeomorphisms and the vertices are of valency 2n+1.at n=2A118095