Question

一道数学题求求大家了，帮帮忙！！！谢谢了！！！

找规律:
a=1,b=1,a#b=0.
a=1,b=2,a#b=0.
a=1,b=3,a#b=0.
a=1,b=4,a#b=0.
a=2,b=1,a#b=1.
a=2,b=2,a#b=3.
a=2,b=3,a#b=?1.
a=2,b=4,a#b=15.
a=3,b=1,a#b=2.
a=3,b=2,a#b=8.
a=3,b=3,a#b=26.
a=3,b=4,a#b=?2.
a=4,b=1,a#b=3.
a=4,b=2,a#b=15.
a=4,b=3,a#b=?3.
a=4,b=4,a#b=255.
请问:
?1=
?2=
?3=
a#b=

Answer 1

a#b=a的b次方减1
所以
?1=7
?2=80
?3=63

Answer 2

?1=7
?2=80
?3=63