|
|
A185013
|
|
Characteristic function of {3}.
|
|
16
|
|
|
0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,1
|
|
COMMENTS
|
Number of connected 2-regular (simple) graphs with girth exactly 3.
|
|
LINKS
|
|
|
FORMULA
|
a(n) = [n = 3], where [ ] is the Iverson bracket. - Wesley Ivan Hurt, Dec 13 2013
|
|
MAPLE
|
|
|
MATHEMATICA
|
|
|
PROG
|
(Python)
|
|
CROSSREFS
|
The Euler transformation of this sequence is A079978.
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|