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A209421
as a triangular array
1
1
1
3
1
1
5
4
1
1
9
7
5
1
1
15
15
9
6
1
1
25
28
22
11
7
1
1
41
53
44
30
13
8
1
1
67
97
91
63
39
15
9
1
1
109
176
179
140
85
49
17
10
1
1
177
315
349
291
201
110
60
19
11
1
1
287
559
667
601
437
275
138
72
21
12
1
1
A209421
as a square array
1
1
3
5
9
15
25
41
67
109
177
287
1
1
4
7
15
28
53
97
176
315
559
1
1
5
9
22
44
91
179
349
667
1
1
6
11
30
63
140
291
601
1
1
7
13
39
85
201
437
1
1
8
15
49
110
275
1
1
9
17
60
138
1
1
10
19
72
1
1
11
21
1
1
12
1
1
1
A209421
as an upper right triangle
1
1
3
5
9
15
25
41
67
109
177
287
1
1
4
7
15
28
53
97
176
315
559
1
1
5
9
22
44
91
179
349
667
1
1
6
11
30
63
140
291
601
1
1
7
13
39
85
201
437
1
1
8
15
49
110
275
1
1
9
17
60
138
1
1
10
19
72
1
1
11
21
1
1
12
1
1
1
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Last modified May 13 17:28 EDT 2024. Contains 372522 sequences. (Running on oeis4.)
