Hyper-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).
A193398
Hyper-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) =215a(1) =636a(2) =1557a(3) =3018a(4) =5555a(5) =8968a(6) =14225a(7) =20790a(8) =30159a(9) =41364a(10) =56525a(11) =74146a(12) =97067a(13) =123168a(14) =156105a(15) =193038a(16) =238535a(17) =288940a(18) =349829a(19) =416634a(20) =496035a(21) =582456a(22) =683777a(23) =793318a(24) =920255a(25) =1056708a(26) =1213245a(27) =1380690a(28) =1571099a(29) =1773904
External references
- oeis: A193398