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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.

A352526 a(n) = Product_{k=0..n} Nimsum (2*k + 2), with Nimsum (2 + 2) = 0 replaced by 1.

Table of values

n a(n)
0 2
1 2
2 12
3 48
4 480
5 3840
6 53760
7 645120
8 11612160
9 185794560
10 4087480320
11 81749606400
12 2125489766400
13 51011754393600
14 1530352631808000
15 42849873690624000
16 1456895705481216000
17 46620662575398912000
18 1771585177865158656000
19 63777066403145711616000
20 2678636788932119887872000

List of values

[2, 2, 12, 48, 480, 3840, 53760, 645120, 11612160, 185794560, 4087480320, 81749606400, 2125489766400, 51011754393600, 1530352631808000, 42849873690624000, 1456895705481216000, 46620662575398912000, 1771585177865158656000, 63777066403145711616000, 2678636788932119887872000]

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

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