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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.

A289800 p-INVERT of the central binomial coefficients (A000984), where p(S) = 1 - S - S^2.

Table of values

n a(n)
0 1
1 4
2 17
3 75
4 336
5 1517
6 6879
7 31276
8 142439
9 649431
10 2963266
11 13528285
12 61785007
13 282257992
14 1289734455
15 5894167695
16 26939918564
17 123142940445
18 562928407213
19 2573477722376
20 11765383864555
21 53790586563231
22 245933621620228
23 1124446028551665
24 5141224466008849

List of values

[1, 4, 17, 75, 336, 1517, 6879, 31276, 142439, 649431, 2963266, 13528285, 61785007, 282257992, 1289734455, 5894167695, 26939918564, 123142940445, 562928407213, 2573477722376, 11765383864555, 53790586563231, 245933621620228, 1124446028551665, 5141224466008849]

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

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