Number of connected unlabeled symmetric relations (graphs with loops) having n nodes such that complement is also connected.
A054922
Number of connected unlabeled symmetric relations (graphs with loops) having n nodes such that complement is also connected.
Terms
- a(0) =2a(1) =0a(2) =0a(3) =10a(4) =164a(5) =2670a(6) =56724a(7) =1867860a(8) =104538928a(9) =10461483366
External references
- oeis: A054922