Site percolation series for hexagonal lattice.

Terms

a(0) =1a(1) =3a(2) =7a(3) =15a(4) =31a(5) =62a(6) =122a(7) =235a(8) =448a(9) =842a(10) =1572a(11) =2904a(12) =5341a(13) =9743a(14) =17718a(15) =32009a(16) =57701a(17) =103445a(18) =185165a(19) =329904a(20) =587136a(21) =1040674a(22) =1843300a(23) =3253020a(24) =5738329a(25) =10090036a(26) =17736533a(27) =31086416a(28) =54484239a(29) =95220744