47

f(1,1)=1/1
f(2,2)=5/4
f(3,3)=65/9
f(4,4)=401/16
f(5,5)=1601/25
f(6,6)=4901/36
f(7,7)=12545/49
f(8,8)=28225/64
f(9,9)=57601/81
f(10,10)=108901/100
f(11,11)=193601/121
f(12,12)=327185/144
f(13,13)=529985/169
f(14,14)=828101/196
f(15,15)=1254401/225
f(16,16)=1849601/256
f(17,17)=2663425/289
f(18,18)=3755845/324
f(19,19)=5198401/361
f(20,20)=7075601/400
f(21,21)=9486401/441
f(22,22)=12545765/484
f(23,23)=16386305/529
f(24,24)=21160001/576
f(25,25)=27040001/625
f(26,26)=34222501/676
f(27,27)=42928705/729
f(28,28)=53406865/784
f(29,29)=65934401/841
f(30,30)=80820101/900
f(31,31)=98406401/961
f(32,32)=119071745/1024
f(33,33)=143233025/1089
f(34,34)=-8040293327604790523/-5419728072580356476
f(35,35)=478757455351505797/3475246406727110701
f(36,36)=2190122497173869277/4402938046962637264
f(37,37)=1006213297523243909/45131588976013565
f(38,38)=2959624924302262403/3035973044318898044
f(39,39)=358319463531989017/1319549635192564617
f(40,40)=6658566414155641521/5910036496683057728
f(41,41)=99088835093789985/12899521363778737
f(42,42)=7543734116196026181/4278938518020688484
f(43,43)=3417494376562882517/3135550588874804781
f(44,44)=209493278555386509/8608963603898230096
f(45,45)=297842692502641213/174254147708459333
f(46,46)=-5929357644000474071/-2039333892127381612
f(47,47)=339806441878834585/3823782959537680697
f(48,48)=8634573536839936217/-4715186992847085312
f(49,49)=60894864875283953/725139330471249