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Number of reflexible maps with n edges.
3

%I #18 Jun 06 2024 12:28:47

%S 2,5,20,85,418,2242,12828,77777,493286,3260485,22314484,157735801,

%T 1147285362,8570960234,65611620808,513963377327,4113363020482,

%U 33598074760393,279764563749076,2372822051513583,20481425601917742

%N Number of reflexible maps with n edges.

%H Antonio Breda d'Azevedo, Alexander Mednykh, and Roman Nedela, <a href="/A170947/b170947.txt">Table of n, a(n) for n = 1..30</a>

%H Antonio Breda d'Azevedo, Alexander Mednykh, and Roman Nedela, <a href="https://doi.org/10.1016/j.disc.2009.11.017">Enumeration of maps regardless of genus: Geometric approach</a>, Discrete Mathematics, Volume 310, 2010, Pages 1184-1203.

%Y Cf. A170948, A170946, A214816.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Feb 21 2010