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.

A261054 Expansion of ( 2+x-x^2+x^3 ) / (1-x^2-x)^3 .

Table of values

n a(n)
0 2
1 7
2 20
3 51
4 118
5 260
6 548
7 1121
8 2236
9 4373
10 8412
11 15960
12 29926
13 55547
14 102196
15 186567
16 338258
17 609532
18 1092328
19 1947829
20 3457724
21 6112873
22 10766328
23 18896880
24 33062090
25 57675631
26 100338836
27 174117915
28 301432558
29 520686644
30 897559340
31 1544207369
32 2651881468
33 4546263293
34 7781245524

List of values

[2, 7, 20, 51, 118, 260, 548, 1121, 2236, 4373, 8412, 15960, 29926, 55547, 102196, 186567, 338258, 609532, 1092328, 1947829, 3457724, 6112873, 10766328, 18896880, 33062090, 57675631, 100338836, 174117915, 301432558, 520686644, 897559340, 1544207369, 2651881468, 4546263293, 7781245524]

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

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