cp's OEIS Frontend

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.

A098461 Expansion of E.g.f.: 1/sqrt(1-2*x-3*x^2).

Table of values

n a(n)
0 1
1 1
2 6
3 42
4 456
5 6120
6 101520
7 1980720
8 44634240
9 1139080320
10 32488646400
11 1023985670400
12 35345049062400
13 1325988036172800
14 53721616851302400
15 2337607853957376000
16 108727934847307776000
17 5383304681800421376000
18 282682783375630589952000

List of values

[1, 1, 6, 42, 456, 6120, 101520, 1980720, 44634240, 1139080320, 32488646400, 1023985670400, 35345049062400, 1325988036172800, 53721616851302400, 2337607853957376000, 108727934847307776000, 5383304681800421376000, 282682783375630589952000]

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

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