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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.

A286840 One of the two successive approximations up to 13^n for 13-adic integer sqrt(-1). Here the 5 (mod 13) case (except for n=0).

Table of values

n a(n)
0 0
1 5
2 70
3 239
4 239
5 143044
6 1999509
7 6826318
8 6826318
9 822557039
10 85658552023
11 1188526486815
12 11941488851037
13 291518510320809
14 2108769149874327
15 13920898306972194
16 13920898306972194
17 2675587335039691558
18 63228498770709057089
19 513050126578538629605

List of values

[0, 5, 70, 239, 239, 143044, 1999509, 6826318, 6826318, 822557039, 85658552023, 1188526486815, 11941488851037, 291518510320809, 2108769149874327, 13920898306972194, 13920898306972194, 2675587335039691558, 63228498770709057089, 513050126578538629605]

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

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