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

Terms

a(0) =108a(1) =0a(2) =0a(3) =0a(4) =900a(5) =2178a(6) =-3672a(7) =0a(8) =14112a(9) =27000a(10) =-18432a(11) =-114444a(12) =290628a(13) =467856a(14) =-354600a(15) =-1479114a(16) =1768536a(17) =12073896a(18) =-5861808a(19) =-29193750a(20) =22900176a(21) =165214728a(22) =64153152a(23) =-654007014a(24) =163350540a(25) =2795893038