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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The graphs do not need to be connected.

LINKS

Table of n, a(n) for n=1..13.

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

Adjacent sequences: A304122 A304123 A304124 * A304126 A304127 A304128

KEYWORD

nonn,more

AUTHOR

Brendan McKay, May 06 2018

EXTENSIONS

a(13) from Brendan McKay, May 08 2018

STATUS

approved

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Last modified February 7 17:57 EST 2023. Contains 360128 sequences. (Running on oeis4.)