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A008867
as a triangular array
1
3
3
6
7
6
10
12
12
10
15
18
19
18
15
21
25
27
27
25
21
28
33
36
37
36
33
28
36
42
46
48
48
46
42
36
45
52
57
60
61
60
57
52
45
55
63
69
73
75
75
73
69
63
55
66
75
82
87
90
91
90
87
82
75
66
78
88
96
102
106
108
108
106
102
96
88
78
A008867
as a square array
1
3
6
10
15
21
28
36
45
55
66
78
3
7
12
18
25
33
42
52
63
75
88
6
12
19
27
36
46
57
69
82
96
10
18
27
37
48
60
73
87
102
15
25
36
48
61
75
90
106
21
33
46
60
75
91
108
28
42
57
73
90
108
36
52
69
87
106
45
63
82
102
55
75
96
66
88
78
A008867
as an upper right triangle
1
3
6
10
15
21
28
36
45
55
66
78
3
7
12
18
25
33
42
52
63
75
88
6
12
19
27
36
46
57
69
82
96
10
18
27
37
48
60
73
87
102
15
25
36
48
61
75
90
106
21
33
46
60
75
91
108
28
42
57
73
90
108
36
52
69
87
106
45
63
82
102
55
75
96
66
88
78
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Last modified May 20 06:19 EDT 2024. Contains 372703 sequences. (Running on oeis4.)