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A185163
Number of not necessarily connected 6-regular simple graphs on n vertices with girth exactly 3.
6
0, 0, 0, 0, 0, 0, 0, 1, 1, 4, 21, 266, 7848, 367860, 21609300, 1470293675, 113314233804, 9799685588955
OFFSET
0,10
FORMULA
a(n) = A165627(n) - A185364(n).
a(n) = A184953(n) + A185053(n).
CROSSREFS
Not necessarily connected k-regular simple graphs girth exactly 3: A198313 (any k), A185643 (triangle); fixed k: A026796 (k=2), A185133 (k=3), A185143 (k=4), A185153 (k=5), this sequence (k=6).
Sequence in context: A198004 A184960 A184963 * A184961 A006822 A165627
KEYWORD
nonn,hard,more
AUTHOR
Jason Kimberley, Mar 21 2012
STATUS
approved