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A151515
Number of 1-sided strip polyhexes with n cells.
0
1, 1, 2, 6, 15, 44, 121, 353, 1005, 2919, 8398, 24310, 70064, 202225, 582365, 1676889, 4821924, 13857720, 39787804
OFFSET
1,3
LINKS
Eric Weisstein's World of Mathematics, Polyhex
CROSSREFS
Sequence in context: A373455 A148438 A148439 * A264746 A052870 A293743
KEYWORD
nonn,hard,more
AUTHOR
Ed Pegg Jr, May 13 2009
EXTENSIONS
a(13)-a(19) from Joseph Myers, Nov 26 2010
STATUS
approved