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%I #22 Jun 24 2023 13:42:05
%S 0,0,1,1,5,16,66,266,1235,6350,37364,251106,1942085,17287710,
%T 177086792,2084120446,28125888087,434318629496,7657513894860
%N Number of n-node (unlabeled) connected graphs with girth 5.
%o (nauty) geng -ctfq $n | countg -qg5 --ng # _Martin Fuller_, May 03 2015
%Y Cf. A128041, A128042.
%Y Cf. A128236, A128237, A128238, A128239, A128240, A128241, A128243.
%K nonn,more
%O 3,5
%A _Keith Briggs_, May 05 2007
%E Corrected and extended by _Martin Fuller_, May 01 2015
%E a(18)-a(21) added by _Georg Grasegger_, May 02 2023
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