OFFSET
1,3
COMMENTS
From R. J. Mathar, Apr 03 2022 (Start)
The sequence contains the row sums of the number of labeled connected simple graphs on V vertices with E edges, the triangle with V>=0, E>=0:
1 ;
1 ;
0 1;
0 0 3 1;
0 0 0 16 12;
0 0 0 0 125 162 15;
0 0 0 0 0 1296 2580 900;
0 0 0 0 0 0 16807 47715 35595 6615 ;
0 0 0 0 0 0 0 262144 1006488 1270080 619920 90720;
0 0 0 0 0 0 0 0 4782969 23859108 44893170 39867660 15892065 1995840 ;
(End)
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Brendan McKay, Jun 12 2021
STATUS
approved