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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.

A383569 Expansion of 1/sqrt((1-x^7)^2 - 4*x^2).

Table of values

n a(n)
0 1
1 0
2 2
3 0
4 6
5 0
6 20
7 1
8 70
9 6
10 252
11 30
12 924
13 140
14 3433
15 630
16 12882
17 2772
18 48710
19 12012
20 185316
21 51481
22 708582
23 218810
24 2720788
25 923990
26 10484684
27 3881556
28 40528441
29 16236486
30 157086660
31 67675972
32 610318610
33 281236620
34 2376289056
35 1165715161
36 9269869182

List of values

[1, 0, 2, 0, 6, 0, 20, 1, 70, 6, 252, 30, 924, 140, 3433, 630, 12882, 2772, 48710, 12012, 185316, 51481, 708582, 218810, 2720788, 923990, 10484684, 3881556, 40528441, 16236486, 157086660, 67675972, 610318610, 281236620, 2376289056, 1165715161, 9269869182]

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

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