Bond percolation coefficients S_0 for square lattice.

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =5a(5) =0a(6) =14a(7) =-4a(8) =42a(9) =-20a(10) =126a(11) =-100a(12) =400a(13) =-376a(14) =1248a(15) =-1556a(16) =4231a(17) =-5588a(18) =13880a(19) =-21912a(20) =48985a(21) =-76404a(22) =165712a(23) =-295660a(24) =602237a(25) =-1017452a(26) =2072268a(27) =-3935956a(28) =7665833a(29) =-13411588