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.

A199396 Binary XOR of (3^k - 1)/2 as k varies from 1 to n.

Table of values

n a(n)
1 1
2 5
3 8
4 32
5 89
6 309
7 1392
8 2464
9 12241
10 23685
11 66936
12 329856
13 598377
14 2972885
15 4204000
16 17321536
17 47254689
18 156943365
19 737779176
20 1276350496
21 6369950073
22 12290868597
23 35051319632
24 175157734688
25 319624706161
26 1569854375813
27 2311734655064
28 9333158201280
29 25600877525257

List of values

[1, 5, 8, 32, 89, 309, 1392, 2464, 12241, 23685, 66936, 329856, 598377, 2972885, 4204000, 17321536, 47254689, 156943365, 737779176, 1276350496, 6369950073, 12290868597, 35051319632, 175157734688, 319624706161, 1569854375813, 2311734655064, 9333158201280, 25600877525257]

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

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