Wiener index of a benzenoid consisting of a double-step spiral chain of n hexagons (n>=2, s=21; see the Gutman et al. reference).
A193397
Wiener index of a benzenoid consisting of a double-step spiral chain of n hexagons (n>=2, s=21; see the Gutman et al. reference).
Terms
- a(0) =109a(1) =271a(2) =553a(3) =955a(4) =1541a(5) =2279a(6) =3265a(7) =4435a(8) =5917a(9) =7615a(10) =9689a(11) =12011a(12) =14773a(13) =17815a(14) =21361a(15) =25219a(16) =29645a(17) =34415a(18) =39817a(19) =45595a(20) =52069a(21) =58951a(22) =66593a(23) =74675a(24) =83581a(25) =92959a(26) =103225a(27) =113995a(28) =125717a(29) =137975
External references
- oeis: A193397