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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.

A269298 Central nonzero values of A231599.

Table of values

n a(n)
0 1
1 2
2 2
3 4
4 6
5 8
6 16
7 28
8 50
9 100
10 196
11 388
12 786
13 1600
14 3280
15 6780
16 14060
17 29280
18 61232
19 128414
20 270084
21 569514
22 1203564
23 2548770
24 5407754
25 11493312
26 24465960
27 52157508
28 111342192
29 237985596
30 509275390
31 1091017632
32 2339687834
33 5022312654
34 10790564790

List of values

[1, 2, 2, 4, 6, 8, 16, 28, 50, 100, 196, 388, 786, 1600, 3280, 6780, 14060, 29280, 61232, 128414, 270084, 569514, 1203564, 2548770, 5407754, 11493312, 24465960, 52157508, 111342192, 237985596, 509275390, 1091017632, 2339687834, 5022312654, 10790564790]

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

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