Number of n-vertex labeled graphs that are gracefully labeled trees.
A033472
Number of n-vertex labeled graphs that are gracefully labeled trees.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =40a(6) =164a(7) =752a(8) =4020a(9) =23576a(10) =155632a(11) =1112032a(12) =8733628a(13) =73547332a(14) =670789524a(15) =6502948232a(16) =67540932632a(17) =740949762580
External references
- oeis: A033472