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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.

A290990 p-INVERT of the nonnegative integers (A000027), where p(S) = 1 - S - S^2.

Table of values

n a(n)
0 0
1 1
2 2
3 5
4 12
5 28
6 64
7 145
8 328
9 743
10 1686
11 3830
12 8704
13 19781
14 44950
15 102133
16 232048
17 527208
18 1197808
19 2721421
20 6183108
21 14048151
22 31917714
23 72517738
24 164761792
25 374342057
26 850512458
27 1932380869
28 4390407092
29 9975090996
30 22663602720
31 51492150953

List of values

[0, 1, 2, 5, 12, 28, 64, 145, 328, 743, 1686, 3830, 8704, 19781, 44950, 102133, 232048, 527208, 1197808, 2721421, 6183108, 14048151, 31917714, 72517738, 164761792, 374342057, 850512458, 1932380869, 4390407092, 9975090996, 22663602720, 51492150953]

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

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