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.

A099488 Expansion of (1-x)^2/((1+x^2)(1-4x+x^2)).

Table of values

n a(n)
0 1
1 2
2 7
3 28
4 105
5 390
6 1455
7 5432
8 20273
9 75658
10 282359
11 1053780
12 3932761
13 14677262
14 54776287
15 204427888
16 762935265
17 2847313170
18 10626317415
19 39657956492
20 148005508553
21 552364077718
22 2061450802319
23 7693439131560
24 28712305723921

List of values

[1, 2, 7, 28, 105, 390, 1455, 5432, 20273, 75658, 282359, 1053780, 3932761, 14677262, 54776287, 204427888, 762935265, 2847313170, 10626317415, 39657956492, 148005508553, 552364077718, 2061450802319, 7693439131560, 28712305723921]

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

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