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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.

A290890 p-INVERT of the positive integers, where p(S) = 1 - S^2.

Table of values

n a(n)
0 0
1 1
2 4
3 11
4 28
5 72
6 188
7 493
8 1292
9 3383
10 8856
11 23184
12 60696
13 158905
14 416020
15 1089155
16 2851444
17 7465176
18 19544084
19 51167077
20 133957148
21 350704367
22 918155952
23 2403763488
24 6293134512
25 16475640049
26 43133785636
27 112925716859
28 295643364940
29 774004377960

List of values

[0, 1, 4, 11, 28, 72, 188, 493, 1292, 3383, 8856, 23184, 60696, 158905, 416020, 1089155, 2851444, 7465176, 19544084, 51167077, 133957148, 350704367, 918155952, 2403763488, 6293134512, 16475640049, 43133785636, 112925716859, 295643364940, 774004377960]

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

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