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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.

A278121 a(n) is denominator of rational z(n) associated with the non-orientable map asymptotics constant p((n+1)/2).

Table of values

n a(n)
0 1
1 12
2 144
3 864
4 27648
5 248832
6 11943936
7 35831808
8 1528823808
9 1719926784
10 220150628352
11 2972033482752
12 1141260857376768
13 106993205379072
14 54780521154084864
15 13695130288521216
16 42071440246337175552
17 739537035580145664
18 6058287395472553279488

List of values

[1, 12, 144, 864, 27648, 248832, 11943936, 35831808, 1528823808, 1719926784, 220150628352, 2972033482752, 1141260857376768, 106993205379072, 54780521154084864, 13695130288521216, 42071440246337175552, 739537035580145664, 6058287395472553279488]

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

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