OFFSET
3,2
COMMENTS
The envelope of the lines form a nephroid.
LINKS
Lars Blomberg, Table of n, a(n) for n = 3..300
Lars Blomberg, Illustration for n = 10
Lars Blomberg, Illustration for n = 20
Lars Blomberg, Illustration for n = 40
Lars Blomberg, Illustration for n = 200
CROSSREFS
KEYWORD
nonn
AUTHOR
Lars Blomberg, May 26 2020
STATUS
approved