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.

A305492 a(n) = ((1 + y)^n - (1 - y)^n)/y with y = sqrt(8).

Table of values

n a(n)
0 0
1 2
2 4
3 22
4 72
5 298
6 1100
7 4286
8 16272
9 62546
10 238996
11 915814
12 3504600
13 13419898
14 51371996
15 196683278
16 752970528
17 2882724002
18 11036241700
19 42251551414
20 161756794728
21 619274449354
22 2370846461804
23 9076614069086
24 34749153370800

List of values

[0, 2, 4, 22, 72, 298, 1100, 4286, 16272, 62546, 238996, 915814, 3504600, 13419898, 51371996, 196683278, 752970528, 2882724002, 11036241700, 42251551414, 161756794728, 619274449354, 2370846461804, 9076614069086, 34749153370800]

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

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