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A209278
as
a triangular array
1
2
1
2
3
1
3
2
4
1
3
4
2
5
1
4
3
5
2
6
1
4
5
3
6
2
7
1
5
4
6
3
7
2
8
1
5
6
4
7
3
8
2
9
1
6
5
7
4
8
3
9
2
10
1
6
7
5
8
4
9
3
10
2
11
1
A209278
as
a square array
1
2
2
3
3
4
4
5
5
6
6
1
3
2
4
3
5
4
6
5
7
1
4
2
5
3
6
4
7
5
1
5
2
6
3
7
4
8
1
6
2
7
3
8
4
1
7
2
8
3
9
1
8
2
9
3
1
9
2
10
1
10
2
1
11
1
A209278
as
an upper right triangle
1
2
2
3
3
4
4
5
5
6
6
1
3
2
4
3
5
4
6
5
7
1
4
2
5
3
6
4
7
5
1
5
2
6
3
7
4
8
1
6
2
7
3
8
4
1
7
2
8
3
9
1
8
2
9
3
1
9
2
10
1
10
2
1
11
1
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Last modified September 19 08:44 EDT 2024. Contains 376007 sequences. (Running on oeis4.)
