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URL: https://oeis.org/A054937

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A054937
Number of chiral pairs of planar maps with n edges.
0
0, 0, 0, 0, 5, 64, 655, 5858, 51369, 448982, 3967466, 35603366, 324990677, 3016738988, 28449849867, 272233685444, 2639649712580, 25902435997188
OFFSET
0,5
LINKS
V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.
FORMULA
a(n) = A006385(n) - A006443(n). - R. J. Mathar, Oct 01 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 24 2000
EXTENSIONS
a(0)=0 prepended by Andrew Howroyd, Jan 13 2025
STATUS
approved