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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.

A153593 a(n) = ((9 + sqrt(2))^n - (9 - sqrt(2))^n)/(2*sqrt(2)).

Table of values

n a(n)
1 1
2 18
3 245
4 2988
5 34429
6 383670
7 4186169
8 45041112
9 480032665
10 5082340122
11 53559541661
12 562566880260
13 5895000053461
14 61667217421758
15 644304909368225
16 6725778192309168
17 70163919621475249
18 731614075994130210

List of values

[1, 18, 245, 2988, 34429, 383670, 4186169, 45041112, 480032665, 5082340122, 53559541661, 562566880260, 5895000053461, 61667217421758, 644304909368225, 6725778192309168, 70163919621475249, 731614075994130210]

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

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