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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.

A385304 Expansion of e.g.f. 1/(1 - 2 * sinh(x))^(1/2).

Table of values

n a(n)
0 1
1 1
2 3
3 16
4 117
5 1096
6 12543
7 169576
8 2644617
9 46735936
10 922993083
11 20145579136
12 481555537917
13 12511452674176
14 351058439096823
15 10579734482269696
16 340820224678288017
17 11687491783287586816
18 425075150516293691763
19 16343274366458168160256
20 662325275389743380902917

List of values

[1, 1, 3, 16, 117, 1096, 12543, 169576, 2644617, 46735936, 922993083, 20145579136, 481555537917, 12511452674176, 351058439096823, 10579734482269696, 340820224678288017, 11687491783287586816, 425075150516293691763, 16343274366458168160256, 662325275389743380902917]

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

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