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Search: a054919 -id:a054919
Displaying 1-2 of 2 results found.
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A318590
Number of connected balanced signed graphs on n unlabeled nodes.
+10
3
1, 1, 2, 5, 28, 177, 1982, 33997, 1020516, 54570672, 5347070228, 967135763525, 324200029119318, 202046821340636691, 234878262433630160622, 511060736355598412146405, 2088401066728281847415734793, 16079824271822965645002329491423, 233994776259866281916838227225733732
(list; graph; refs; listen; history; text; internal format)
A054920
Number of connected unlabeled reflexive relations with n nodes such that complement is also connected.
+10
1
2, 4, 68, 2592, 278796, 95720106, 111891292036, 457846756500066, 6664787020904248568, 349363873490889302878250, 66602024342830108271942323060, 46557190064705399729526041154647820
(list; graph; refs; listen; history; text; internal format)
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