My count is 49 such positive integers exist:
1
1
= 1
2
1 =
2
3
1 =
3
4
1 =
4
5
1 =
5
6
1 =
6
7
1 =
7
8
1 =
8
9
1 =
9
4
2 =
16
5
2 =
25
6
2 =
36
7
2 =
49
8
2 =
64
9
2 =
81
5
3 =
125
6
3 =
216
7
3 =
343
8
3 =
512
9
3 =
729
6
4 =
1296
7
4 =
2401
8
4 =
4096
9
4 =
6561
7
5 =
16807
8
5 =
32768
9
5 =
59049
7
6 =
117649
8
6 =
262144
9
6 =
531441
8
7 =
2097152
9
7 =
4782969
8
8 =
16777216
9
8 =
43046721
8
9 =
134217728
9
9 =
387420489
8
10 =
1073741824
9
10 =
3486784401
9
11 =
31381059609
9
12 =
282429536481
9
13 =
2541865828329
9
14 =
22876792454961
9
15 =
205891132094649
9
16 =
1853020188851841
9
17 =
16677181699666569
9
18 =
150094635296999121
9
19 =
1350851717672992089
9
20 =
12157665459056928801
9
21 =
109418989131512359209
|
|
Posted by Dej Mar
on 2015-10-20 12:34:53 |
answer
