cp's OEIS Frontend

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.

A363773 a(n) = (4^(n+1) + (-1)^n + 5)/10.

Table of values

n a(n)
0 1
1 2
2 7
3 26
4 103
5 410
6 1639
7 6554
8 26215
9 104858
10 419431
11 1677722
12 6710887
13 26843546
14 107374183
15 429496730
16 1717986919
17 6871947674
18 27487790695
19 109951162778
20 439804651111
21 1759218604442
22 7036874417767
23 28147497671066
24 112589990684263
25 450359962737050

List of values

[1, 2, 7, 26, 103, 410, 1639, 6554, 26215, 104858, 419431, 1677722, 6710887, 26843546, 107374183, 429496730, 1717986919, 6871947674, 27487790695, 109951162778, 439804651111, 1759218604442, 7036874417767, 28147497671066, 112589990684263, 450359962737050]

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

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