A214816 Number of unsensed maps with n edges on a surface of genus g, summed on g = 0 through [n/2]..

1, 2, 5, 20, 96, 644, 5839, 67834, 970568, 16256556, 308620966, 6506035400

Offset

0,2

Links

Table of n, a(n) for n=0..11.

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

T. R. Walsh, Space-Efficient Generation of Nonisomorphic Maps and Hypermaps, J. Int. Seq. 18 (2015) # 15.4.3

Crossrefs

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

Sequence in context: A115082 A020105 A347071 * A020005 A259834 A074415

Adjacent sequences: A214813 A214814 A214815 * A214817 A214818 A214819

Keyword

nonn

Author

N. J. A. Sloane, Jul 31 2012

Status

approved