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A304125
Number of simple graphs with n vertices which contain no K5 subgraph.
2
1, 2, 4, 11, 33, 150, 986, 11416, 245440, 10164119, 793907916, 114150623175, 29709609171994
OFFSET
1,2
COMMENTS
The graphs do not need to be connected.
FORMULA
a(n) = 1+A052450(n)+A052451(n)+A052452(n).
CROSSREFS
Cf. A000088, A006785 (no K3), A115196 (graphs by clique number), A304124 (no K4).
Sequence in context: A123450 A052431 A076316 * A082104 A198634 A287007
KEYWORD
nonn,more
AUTHOR
Brendan McKay, May 06 2018
EXTENSIONS
a(13) from Brendan McKay, May 08 2018
STATUS
approved