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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.

A290802 One of the two successive approximations up to 7^n for the 7-adic integer sqrt(-6). These are the numbers congruent to 6 mod 7 (except for the initial 0).

Table of values

n a(n)
0 0
1 6
2 27
3 223
4 2281
5 7083
6 91118
7 679363
8 5620621
9 22915024
10 22915024
11 1717766518
12 13581726976
13 13581726976
14 498026779011
15 1854472924709
16 16097157454538
17 115795949163341
18 1046318005112169
19 1046318005112169
20 23844108375858455
21 103636374673470456

List of values

[0, 6, 27, 223, 2281, 7083, 91118, 679363, 5620621, 22915024, 22915024, 1717766518, 13581726976, 13581726976, 498026779011, 1854472924709, 16097157454538, 115795949163341, 1046318005112169, 1046318005112169, 23844108375858455, 103636374673470456]

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

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