File:Triangular number 15.png

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Transferred from en.wikipedia to Commons by Maksim.

15 as a triangular number. Created by User:Fredrik.

Part of the series:

• Image:Triangular number 1.png
• Image:Triangular number 3.png
• Image:Triangular number 6.png
• Image:Triangular number 10.png
• Image:Triangular number 15.png
• Image:Triangular number 21.png

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log[edit]

Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version.

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• (del) (cur) 00:06, 2 December 2004 . . en:User:Fredrik Fredrik ( en:User_talk:Fredrik Talk) . . 232x80 (362 bytes) (description to be added)