Number of unrooted steric quartic trees with 2n (unlabeled) nodes and possessing a bicentroid; number of 2n-carbon alkanes C(2n)H(4n +2) with a bicentroid when stereoisomers are regarded as different.
A086200
Number of unrooted steric quartic trees with 2n (unlabeled) nodes and possessing a bicentroid; number of 2n-carbon alkanes C(2n)H(4n +2) with a bicentroid when stereoisomers are regarded as different.
Terms
- a(0) =1a(1) =3a(2) =15a(3) =66a(4) =406a(5) =2775a(6) =19900a(7) =152076a(8) =1206681a(9) =9841266a(10) =82336528a(11) =702993756a(12) =6105180250a(13) =53822344278a(14) =480681790786
External references
- oeis: A086200