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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.

A189499 Number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero.

Table of values

n a(n)
1 4
2 12
3 38
4 78
5 148
6 240
7 380
8 554
9 788
10 1062
11 1410
12 1806
13 2294
14 2844
15 3498
16 4226
17 5068
18 5988
19 7040
20 8180
21 9466
22 10850
23 12396
24 14046
25 15876
26 17824
27 19960
28 22226
29 24696
30 27296
31 30118
32 33090
33 36288
34 39642
35 43242
36 47002
37 51022
38 55220
39 59690
40 64346
41 69294

List of values

[4, 12, 38, 78, 148, 240, 380, 554, 788, 1062, 1410, 1806, 2294, 2844, 3498, 4226, 5068, 5988, 7040, 8180, 9466, 10850, 12396, 14046, 15876, 17824, 19960, 22226, 24696, 27296, 30118, 33090, 36288, 39642, 43242, 47002, 51022, 55220, 59690, 64346, 69294]

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

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