(In reply to
computer exploration by Charlie)
UBASIC program
10 for Tot=1 to 2000
20 for X=1 to int(Tot/2)
30 Y=TotX
40 V1=3^X+1
50 V2=3^Y+1
60 D=X*Y
70 R1=V1@D:R2=V2@D
80 if R1=0 and R2=0 then print X;Y,V1;V2,D
90 next
100 next
still finds only the two solutions (1,1) and (1,2)  and also of course (2,1) is to be counted as well.

Posted by Charlie
on 20150920 18:58:36 