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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.

A326931 a(n) is the end square spiral number for a knight starting on square n moving on a board with squares numbered with the square of their distance from the 0-square origin and where the knight moves to the smallest numbered unvisited square; the smallest spiral number ordering is used if the distances are equal.

Table of values

n a(n)
1 25984
2 51159
3 8224
4 31440
5 8224
6 31440
7 8224
8 110081
9 131178
10 92879
11 69289
12 59225
13 62391
14 10042
15 66686
16 73825
17 36212
18 123343
19 158628
20 28616
21 74166
22 98142
23 59386
24 50028
25 42525
26 15828
27 7092
28 27981
29 57726
30 27313
31 52761
32 15586
33 47169
34 17233
35 152620
36 73042
37 76303
38 83957
39 59892
40 9567

List of values

[25984, 51159, 8224, 31440, 8224, 31440, 8224, 110081, 131178, 92879, 69289, 59225, 62391, 10042, 66686, 73825, 36212, 123343, 158628, 28616, 74166, 98142, 59386, 50028, 42525, 15828, 7092, 27981, 57726, 27313, 52761, 15586, 47169, 17233, 152620, 73042, 76303, 83957, 59892, 9567]

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

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