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From Wikipedia, the free encyclopedia

207 (two hundred [and] seven) is the natural number following 206 and preceding 208.

It is a Wedderburn-Etherington number.[1] There are exactly 207 different matchstick graphs with eight edges.[2][3]

See also


  1. ^ Sloane, N. J. A. (ed.). "Sequence A001190 (Wedderburn-Etherington numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A066951 (Number of nonisomorphic connected graphs that can be drawn in the plane using n unit-length edges)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Salvia, Raffaele (2013). "A catalog for matchstick graphs". arXiv:1303.5965 [math.CO].

This page was last edited on 18 June 2018, at 22:06
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