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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.

A381171 Expansion of e.g.f. (1/x) * Series_Reversion( x / (1 + x*cosh(x)) ).

Table of values

n a(n)
0 1
1 1
2 2
3 9
4 72
5 725
6 8640
7 124117
8 2117248
9 41477193
10 913305600
11 22371549761
12 604476094464
13 17858943664861
14 572524035586048
15 19793963392789965
16 734249332747960320
17 29090332675789113617
18 1225991945551031304192
19 54765451909152748484857
20 2584803582762012599910400

List of values

[1, 1, 2, 9, 72, 725, 8640, 124117, 2117248, 41477193, 913305600, 22371549761, 604476094464, 17858943664861, 572524035586048, 19793963392789965, 734249332747960320, 29090332675789113617, 1225991945551031304192, 54765451909152748484857, 2584803582762012599910400]

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

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