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A151537
Number of 1-sided polyedges with n edges.
3
1, 2, 7, 25, 99, 416, 1854, 8411, 38980, 182829, 867096, 4145168, 19955321, 96619260, 470157772
OFFSET
1,2
LINKS
Ishino Keiichiro, Polyedge, Puzzle will be played, 2009.
Eric Weisstein's World of Mathematics, Polyedge
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Ed Pegg Jr, May 13 2009
EXTENSIONS
a(11)-a(14) from Joseph Myers, Oct 03 2011
a(15) from Ishino Keiichiro's website added by Andrey Zabolotskiy, Dec 10 2023
STATUS
approved