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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.

A341208 a(n) = F(n+4) * F(n+1) - 4 * (-1)^n where F(n) = A000045(n) are the Fibonacci numbers.

Table of values

n a(n)
1 9
2 12
3 43
4 101
5 276
6 711
7 1873
8 4892
9 12819
10 33549
11 87844
12 229967
13 602073
14 1576236
15 4126651
16 10803701
17 28284468
18 74049687
19 193864609
20 507544124
21 1328767779
22 3478759197
23 9107509828
24 23843770271
25 62423801001
26 163427632716
27 427859097163
28 1120149658757

List of values

[9, 12, 43, 101, 276, 711, 1873, 4892, 12819, 33549, 87844, 229967, 602073, 1576236, 4126651, 10803701, 28284468, 74049687, 193864609, 507544124, 1328767779, 3478759197, 9107509828, 23843770271, 62423801001, 163427632716, 427859097163, 1120149658757]

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

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