[seqfan] A178789 Koch snowflake angles description
Kevin Ryde
user42 at zip.com.au
Tue Dec 17 19:45:35 CET 2013
I found the description
A178789 Koch snowflake: number of angles after n iterations.
a bit hard to understand exactly what it counted. I thought first
"angles" might mean how many angles could be made by taking points
pairwise, but that's bigger.
I take it it refers to "acute" angles, which are the pointy points,
which are the right hand turns when going clockwise. Eg. n=3 ascii art
below "*" points are a(3)=18. Perhaps the description could be extended
or clarified somehow.
*
/ \
*----@ @----*
\ /
* @ @ *
/ \ / \ / \
*----@ @----@ @----@ @----*
\ /
@ @
/ \
*----@ @----*
\ /
@ @
/ \
*----@ @----*
\ /
@ @
/ \
*----@ @----@ @----@ @----*
\ / \ / \ /
* @ @ *
/ \
*----@ @----*
\ /
*
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