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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.

A206819 Riordan array (1/(1-10*x-10*x^2), x/(1-10*x-10*x^2)).

Table of values

n a(n)
0 1
1 10
2 1
3 90
4 20
5 1
6 800
7 280
8 30
9 1
10 7100
11 3400
12 570
13 40
14 1
15 63000
16 38300
17 8800
18 960
19 50
20 1
21 559000
22 412000
23 120600
24 18000
25 1450
26 60
27 1
28 4960000
29 4296000
30 1530000
31 291000
32 32000
33 2040
34 70
35 1

List of values

[1, 10, 1, 90, 20, 1, 800, 280, 30, 1, 7100, 3400, 570, 40, 1, 63000, 38300, 8800, 960, 50, 1, 559000, 412000, 120600, 18000, 1450, 60, 1, 4960000, 4296000, 1530000, 291000, 32000, 2040, 70, 1]

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

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