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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A075880 Position of the circles around (0,0) that contain record numbers of lattice points in the list of all circles around (0,0) that pass through lattice points, ordered by increasing radius.

Table of values

n a(n)
1 0
2 1
3 4
4 13
5 30
6 121
7 362
8 1232
9 1584
10 7121
11 17548
12 32649
13 37603
14 174926
15 437750
16 821432
17 1198677
18 5678338
19 14335447
20 27044791
21 43735981
22 209473053
23 531787054
24 1006745669
25 2097411347
26 8474384496
27 10122355701

List of values

[0, 1, 4, 13, 30, 121, 362, 1232, 1584, 7121, 17548, 32649, 37603, 174926, 437750, 821432, 1198677, 5678338, 14335447, 27044791, 43735981, 209473053, 531787054, 1006745669, 2097411347, 8474384496, 10122355701]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.