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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.

A300793 a(n) is the n-th derivative of arcsinh(1/x) at x=1 times (-2)^n/sqrt(2) for n >= 1.

Table of values

n a(n)
1 1
2 3
3 13
4 75
5 561
6 5355
7 63405
8 894915
9 14511105
10 263544435
11 5284255725
12 116065424475
13 2778006733425
14 72093290744475
15 2017526711525325
16 60547198550713875
17 1938662110170410625
18 65941564342927147875
19 2374177441960545346125
20 90211614359319635056875

List of values

[1, 3, 13, 75, 561, 5355, 63405, 894915, 14511105, 263544435, 5284255725, 116065424475, 2778006733425, 72093290744475, 2017526711525325, 60547198550713875, 1938662110170410625, 65941564342927147875, 2374177441960545346125, 90211614359319635056875]

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

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