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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.

A338225 a(n) = F(n+3) * F(n+1) + (-1)^n where F(n) = A000045(n) are the Fibonacci numbers.

Table of values

n a(n)
1 2
2 11
3 23
4 66
5 167
6 443
7 1154
8 3027
9 7919
10 20738
11 54287
12 142131
13 372098
14 974171
15 2550407
16 6677058
17 17480759
18 45765227
19 119814914
20 313679523
21 821223647
22 2149991426
23 5628750623
24 14736260451
25 38580030722
26 101003831723
27 264431464439
28 692290561602
29 1812440220359
30 4745030099483

List of values

[2, 11, 23, 66, 167, 443, 1154, 3027, 7919, 20738, 54287, 142131, 372098, 974171, 2550407, 6677058, 17480759, 45765227, 119814914, 313679523, 821223647, 2149991426, 5628750623, 14736260451, 38580030722, 101003831723, 264431464439, 692290561602, 1812440220359, 4745030099483]

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

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