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A306779
as
a triangular array
1
2
4
3
5
9
4
8
11
16
5
9
14
19
25
6
12
18
24
29
36
7
13
19
27
33
41
A306779
as
a square array
1
2
3
4
5
6
7
4
5
8
9
12
13
9
11
14
18
19
16
19
24
27
25
29
33
36
41
A306779
as
an upper right triangle
1
2
3
4
5
6
7
4
5
8
9
12
13
9
11
14
18
19
16
19
24
27
25
29
33
36
41