Integer solutions to sum of reciprocals equals a reciprocal

A

B

C

2

2

1

3

6

2

4

12

3

5

20

4

6

30

5

7

42

6

10

15

6

8

56

7

9

72

8

10

90

9

14

35

10

21

28

12

18

63

14

24

40

15

22

99

18

36

45

20

30

70

21

33

88

24

44

77

28

55

66

30

60

84

35

78

91

42