cp's OEIS Frontend

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.

A220099 Sum of the eight nearest neighbors of n in a double spiral with positive integers and 1 at the center.

Table of values

n a(n)
1 44
2 66
3 63
4 94
5 91
6 81
7 80
8 101
9 100
10 158
11 154
12 133
13 131
14 153
15 151
16 222
17 218
18 185
19 183
20 190
21 186
22 206
23 202
24 237
25 235
26 318
27 314
28 269
29 267
30 270
31 266
32 286
33 282
34 321
35 319
36 414
37 410
38 353
39 351
40 350
41 346
42 366
43 362
44 382
45 378
46 398
47 394
48 437
49 435
50 542
51 538
52 469
53 467
54 462
55 458

List of values

[44, 66, 63, 94, 91, 81, 80, 101, 100, 158, 154, 133, 131, 153, 151, 222, 218, 185, 183, 190, 186, 206, 202, 237, 235, 318, 314, 269, 267, 270, 266, 286, 282, 321, 319, 414, 410, 353, 351, 350, 346, 366, 362, 382, 378, 398, 394, 437, 435, 542, 538, 469, 467, 462, 458]

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

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