Bond series for first parallel moment of hexagonal net.

Terms

a(0) =1a(1) =4a(2) =6a(3) =16a(4) =20a(5) =48a(6) =52a(7) =123a(8) =120a(9) =292a(10) =244a(11) =658a(12) =462a(13) =1440a(14) =761a(15) =3111a(16) =1066a(17) =6696a(18) =804a(19) =14522a(20) =-1607a(21) =31915a(22) =-11438a(23) =71482a(24) =-42420a(25) =163414a(26) =-133102a(27) =381148a(28) =-382217a(29) =906108