Number of odd length roads between any adjacent nodes in virtual optimal chordal ring of degree 3 (the length of chord < number of nodes/2).
A087457
Number of odd length roads between any adjacent nodes in virtual optimal chordal ring of degree 3 (the length of chord < number of nodes/2).
Terms
- a(0) =1a(1) =5a(2) =31a(3) =213a(4) =1551a(5) =11723a(6) =90945a(7) =719253a(8) =5773279a(9) =46889355a(10) =384487665a(11) =3177879675a(12) =26442188865a(13) =221278343445
External references
- oeis: A087457