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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.

A307287 Coordinates Y_lower(n) of P-positions in Maharaja Nim on square spiral (see Comments for precise definition).

Table of values

n a(n)
0 0
1 1
2 9
3 13
4 19
5 22
6 37
7 52
8 58
9 69
10 78
11 84
12 90
13 101
14 112
15 118
16 132
17 138
18 149
19 160
20 171
21 180
22 191
23 200
24 211
25 222
26 228
27 237
28 248
29 259
30 268
31 279
32 288
33 299
34 308
35 319
36 325
37 336
38 345
39 356
40 362
41 373
42 382
43 393
44 402
45 413
46 424
47 430
48 441
49 450
50 461
51 470
52 481
53 487
54 498

List of values

[0, 1, 9, 13, 19, 22, 37, 52, 58, 69, 78, 84, 90, 101, 112, 118, 132, 138, 149, 160, 171, 180, 191, 200, 211, 222, 228, 237, 248, 259, 268, 279, 288, 299, 308, 319, 325, 336, 345, 356, 362, 373, 382, 393, 402, 413, 424, 430, 441, 450, 461, 470, 481, 487, 498]