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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.

A318960 One of the two successive approximations up to 2^n for 2-adic integer sqrt(-7). This is the 1 (mod 4) case.

Table of values

n a(n)
2 1
3 5
4 5
5 21
6 53
7 53
8 181
9 181
10 181
11 181
12 181
13 181
14 181
15 16565
16 49333
17 49333
18 49333
19 49333
20 573621
21 1622197
22 1622197
23 1622197
24 10010805
25 10010805
26 10010805
27 77119669
28 211337397
29 479772853
30 479772853
31 479772853
32 2627256501
33 6922223797
34 15512158389
35 15512158389

List of values

[1, 5, 5, 21, 53, 53, 181, 181, 181, 181, 181, 181, 181, 16565, 49333, 49333, 49333, 49333, 573621, 1622197, 1622197, 1622197, 10010805, 10010805, 10010805, 77119669, 211337397, 479772853, 479772853, 479772853, 2627256501, 6922223797, 15512158389, 15512158389]

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

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