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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.

A363403 a(n) = (4^n - 2^n) / Clausen(n, 1).

Table of values

n a(n)
0 0
1 1
2 2
3 28
4 8
5 496
6 96
7 8128
8 2176
9 130816
10 15872
11 2096128
12 6144
13 33550336
14 44736512
15 536854528
16 8421376
17 8589869056
18 86114304
19 137438691328
20 3331850240
21 2199022206976
22 127479578624
23 35184367894528
24 103104380928
25 562949936644096
26 750599926710272
27 9007199187632128

List of values

[0, 1, 2, 28, 8, 496, 96, 8128, 2176, 130816, 15872, 2096128, 6144, 33550336, 44736512, 536854528, 8421376, 8589869056, 86114304, 137438691328, 3331850240, 2199022206976, 127479578624, 35184367894528, 103104380928, 562949936644096, 750599926710272, 9007199187632128]

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

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