The OEIS mourns the passing of
Jim Simons
and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A047998
as a triangular array
1
0
1
0
0
1
0
0
1
1
0
0
0
2
1
0
0
0
1
3
1
0
0
0
1
3
4
1
0
0
0
0
3
6
5
1
0
0
0
0
2
7
10
6
1
0
0
0
0
1
7
14
15
7
1
0
0
0
0
1
5
17
25
21
8
1
0
0
0
0
0
5
16
35
41
28
9
1
0
0
0
0
0
3
16
40
65
63
36
10
1
0
0
0
0
0
2
14
43
86
112
92
45
11
1
0
0
0
0
0
1
11
44
102
167
182
129
55
12
1
0
0
0
0
0
1
9
40
115
219
301
282
175
66
13
1
A047998
as a square array
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
2
1
1
0
0
0
0
0
0
0
0
0
1
3
3
3
2
1
1
0
0
0
0
0
1
4
6
7
7
5
5
3
2
1
1
1
5
10
14
17
16
16
14
11
9
1
6
15
25
35
40
43
44
40
1
7
21
41
65
86
102
115
1
8
28
63
112
167
219
1
9
36
92
182
301
1
10
45
129
282
1
11
55
175
1
12
66
1
13
1
A047998
as an upper right triangle
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
2
1
1
0
0
0
0
0
0
0
0
0
1
3
3
3
2
1
1
0
0
0
0
0
1
4
6
7
7
5
5
3
2
1
1
1
5
10
14
17
16
16
14
11
9
1
6
15
25
35
40
43
44
40
1
7
21
41
65
86
102
115
1
8
28
63
112
167
219
1
9
36
92
182
301
1
10
45
129
282
1
11
55
175
1
12
66
1
13
1
Lookup
|
Welcome
|
Wiki
|
Register
|
Music
|
Plot 2
|
Demos
|
Index
|
Browse
|
More
|
WebCam
Contribute new seq. or comment
|
Format
|
Style Sheet
|
Transforms
|
Superseeker
|
Recents
The OEIS Community
| Maintained by
The OEIS Foundation Inc.
License Agreements, Terms of Use, Privacy Policy.
.
Last modified May 26 05:37 EDT 2024. Contains 372807 sequences. (Running on oeis4.)
