A112949 Number of unrooted regular planar maps of valency 5 with 2n vertices (considered up to orientation-preserving homeomorphisms).

7, 468, 111096, 39670362, 17313263640, 8581243954044, 4650485509103976, 2692853733312152946, 1641063780244320916056, 1041574815624514527248040

Offset

1,1

Comments

No closed formula is known.

Links

Table of n, a(n) for n=1..10.

Z. C. Gao, V. A. Liskovets and N. C. Wormald, Enumeration of unrooted odd-valent regular planar maps, Preprint, 2005.

Crossrefs

Cf. A112948, A112950.

Sequence in context: A015105 A269550 A238164 * A254966 A345455 A261806

Adjacent sequences: A112946 A112947 A112948 * A112950 A112951 A112952

Keyword

nonn

Author

Valery A. Liskovets, Oct 10 2005

Status

approved