Low-temperature susceptibility expansion for hexagonal lattice (Potts model, q=4).

Terms

a(0) =3a(1) =0a(2) =0a(3) =0a(4) =36a(5) =72a(6) =-72a(7) =0a(8) =711a(9) =1080a(10) =144a(11) =-2556a(12) =12852a(13) =23004a(14) =-504a(15) =-21192a(16) =122877a(17) =525996a(18) =69366a(19) =-531576a(20) =1970154a(21) =7833756a(22) =6613164a(23) =-12953124a(24) =24243261a(25) =137623572a(26) =130318974a(27) =-138059232a(28) =115953372a(29) =2338653528