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A001404
as a triangular array
1
1
1
2
2
1
4
5
2
1
9
11
5
2
1
20
25
12
5
2
1
45
57
27
12
5
2
1
102
129
62
28
12
5
2
1
231
293
141
64
28
12
5
2
1
524
665
321
146
65
28
12
5
2
1
1189
1510
729
333
148
65
28
12
5
2
1
2699
3428
1656
A001404
as a square array
1
1
2
4
9
20
45
102
231
524
1189
2699
1
2
5
11
25
57
129
293
665
1510
3428
1
2
5
12
27
62
141
321
729
1656
1
2
5
12
28
64
146
333
1
2
5
12
28
65
148
1
2
5
12
28
65
1
2
5
12
28
1
2
5
12
1
2
5
1
2
1
A001404
as an upper right triangle
1
1
2
4
9
20
45
102
231
524
1189
2699
1
2
5
11
25
57
129
293
665
1510
3428
1
2
5
12
27
62
141
321
729
1656
1
2
5
12
28
64
146
333
1
2
5
12
28
65
148
1
2
5
12
28
65
1
2
5
12
28
1
2
5
12
1
2
5
1
2
1
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Last modified May 16 10:52 EDT 2024. Contains 372552 sequences. (Running on oeis4.)
