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A074909
as a triangular array
1
1
2
1
3
3
1
4
6
4
1
5
10
10
5
1
6
15
20
15
6
1
7
21
35
35
21
7
1
8
28
56
70
56
28
8
1
9
36
84
126
126
84
36
9
1
10
45
120
210
252
210
120
45
10
1
11
55
165
330
462
462
330
165
55
11
A074909
as a square array
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
3
6
10
15
21
28
36
45
55
4
10
20
35
56
84
120
165
5
15
35
70
126
210
330
6
21
56
126
252
462
7
28
84
210
462
8
36
120
330
9
45
165
10
55
11
A074909
as an upper right triangle
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
3
6
10
15
21
28
36
45
55
4
10
20
35
56
84
120
165
5
15
35
70
126
210
330
6
21
56
126
252
462
7
28
84
210
462
8
36
120
330
9
45
165
10
55
11
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Last modified May 14 20:39 EDT 2024. Contains 372533 sequences. (Running on oeis4.)
