Number of connected graphs on n labeled nodes on a circle with straight-line edges that don't cross.
A007297
Number of connected graphs on n labeled nodes on a circle with straight-line edges that don't cross.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =23a(4) =156a(5) =1162a(6) =9192a(7) =75819a(8) =644908a(9) =5616182a(10) =49826712a(11) =448771622a(12) =4092553752a(13) =37714212564a(14) =350658882768
External references
- oeis: A007297