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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.

A329007 a(n) = p(2,n), where p(x,n) is the strong divisibility sequence of polynomials based on sqrt(2) as in A327320.

Table of values

n a(n)
1 1
2 9
3 21
4 405
5 2511
6 5103
7 92583
8 557685
9 372519
10 20135709
11 120873303
12 241805655
13 4353033231
14 26119793709
15 52241181741
16 940355620245
17 5642176768191
18 3761465527701
19 203119525916343
20 1218718317759525
21 2437437797780517
22 43873890820402509
23 263243376303474663

List of values

[1, 9, 21, 405, 2511, 5103, 92583, 557685, 372519, 20135709, 120873303, 241805655, 4353033231, 26119793709, 52241181741, 940355620245, 5642176768191, 3761465527701, 203119525916343, 1218718317759525, 2437437797780517, 43873890820402509, 263243376303474663]

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

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