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.

A024502 a(n) = floor(C(2n,n)/2^n).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 4
5 7
6 14
7 26
8 50
9 94
10 180
11 344
12 660
13 1269
14 2448
15 4733
16 9171
17 17804
18 34618
19 67415
20 131460
21 256661
22 501656
23 981501
24 1922106
25 3767329
26 7389761
27 14505829
28 28493592
29 56004648
30 110142474
31 216731966
32 426691058
33 840452084
34 1656184990

List of values

[1, 1, 1, 2, 4, 7, 14, 26, 50, 94, 180, 344, 660, 1269, 2448, 4733, 9171, 17804, 34618, 67415, 131460, 256661, 501656, 981501, 1922106, 3767329, 7389761, 14505829, 28493592, 56004648, 110142474, 216731966, 426691058, 840452084, 1656184990]

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

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