First numerator and then denominator of the central elements of the 1/4-Pascal triangle (by row).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =5a(5) =2a(6) =19a(7) =2a(8) =35a(9) =1a(10) =259a(11) =2a(12) =483a(13) =1a(14) =1815a(15) =1a(16) =6864a(17) =1a(18) =52195a(19) =2a(20) =99671a(21) =1a(22) =382109a(23) =1a(24) =1469650a(25) =1a(26) =5668327a(27) =1a(28) =21915550a(29) =1