Total number of squares and rectangles in the toothpick structure after n stages (see A139250).
0, 0, 0, 2, 4, 4, 8, 18, 24, 24, 28, 36, 40, 44, 64, 94, 108, 108, 112, 120, 124, 128, 148
3 seqfan posts
Wed Jan 13 12:56:27 CET 2010 [seqfan] Re: Toothpick A139250 defines set of graphs.
Thu Jun 11 01:00:39 CEST 2009 [seqfan] Re: Toothpick sequences (again)
Fri Jun 5 00:25:37 CEST 2009 [seqfan] Re: Toothpick sequences (again)
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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