Number of benzenoids with 22 hexagons, C_(2v) symmetry and containing n carbon atoms.

Terms

a(0) =4a(1) =8a(2) =56a(3) =54a(4) =211a(5) =178a(6) =770a(7) =493a(8) =2349a(9) =1193a(10) =6479a(11) =2788a(12) =16960a(13) =5908a(14) =40657a(15) =11169a(16) =89378a(17) =19138a(18) =176325a(19) =27984a(20) =311332a(21) =36524a(22) =478536a(23) =35025a(24) =599661a(25) =20387a(26) =517568a(27) =0a(28) =251310