Number of unrooted quartic trees with 2n (unlabeled) nodes and possessing a bicentroid; number of 2n-carbon alkanes C(2n)H(4n+2) with a bicentroid, ignoring stereoisomers.
A010373
Number of unrooted quartic trees with 2n (unlabeled) nodes and possessing a bicentroid; number of 2n-carbon alkanes C(2n)H(4n+2) with a bicentroid, ignoring stereoisomers.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =36a(5) =153a(6) =780a(7) =4005a(8) =22366a(9) =128778a(10) =766941a(11) =4674153a(12) =29180980a(13) =185117661a(14) =1193918545a(15) =7800816871a(16) =51584238201a(17) =344632209090
External references
- oeis: A010373