A297880 Number of unsensed genus 4 maps with n edges.

0, 0, 0, 0, 0, 0, 0, 0, 7258, 688976, 37466297, 1512650776, 50355225387, 1461269893538, 38236656513725, 922552326544030, 20847359639841664, 446290728182323620, 9129236228868478458, 179639607187998993180, 3418366706444416598777

Offset

0,9

Links

Table of n, a(n) for n=0..20.

Evgeniy Krasko and Alexander Omelchenko, Enumeration of Unsensed Orientable Maps on Surfaces of a Given Genus, arXiv:1712.10139 [math.CO], 2017.

Timothy R. Walsh, Space-efficient generation of nonisomorphic maps and hypermaps.

Crossrefs

Column k=4 of A379439.

Cf. A215402 (rooted), A215019 (sensed).

Cf. A006385, A006387, A214814, A214815, A214816.

Sequence in context: A272160 A093224 A253529 * A084276 A152502 A251226

Adjacent sequences: A297877 A297878 A297879 * A297881 A297882 A297883

Keyword

nonn,changed

Author

Evgeniy Krasko, Jan 07 2018

Extensions

a(20) added by Andrew Howroyd, Jan 20 2025

Status

approved