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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.

A236428 a(n) = F(n+1)^2 + F(n+1)*F(n) - F(n)^2, where F = A000045.

Table of values

n a(n)
0 1
1 1
2 5
3 11
4 31
5 79
6 209
7 545
8 1429
9 3739
10 9791
11 25631
12 67105
13 175681
14 459941
15 1204139
16 3152479
17 8253295
18 21607409
19 56568929
20 148099381
21 387729211
22 1015088255
23 2657535551
24 6957518401
25 18215019649
26 47687540549
27 124847601995
28 326855265439
29 855718194319

List of values

[1, 1, 5, 11, 31, 79, 209, 545, 1429, 3739, 9791, 25631, 67105, 175681, 459941, 1204139, 3152479, 8253295, 21607409, 56568929, 148099381, 387729211, 1015088255, 2657535551, 6957518401, 18215019649, 47687540549, 124847601995, 326855265439, 855718194319]

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

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