Denominator of Kirchhoff index of ladder graph L_n.

Terms

a(0) =1a(1) =1a(2) =5a(3) =7a(4) =209a(5) =65a(6) =2911a(7) =679a(8) =4505a(9) =37829a(10) =564719a(11) =87815a(12) =7865521a(13) =7338631a(14) =1460701a(15) =12776743a(16) =1525870529a(17) =158184065a(18) =21252634831a(19) =9914489123a(20) =98670339035a(21) =276182038859a(23) =320559963815