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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.

A189490 Number of arrangements of n+1 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 0
2 12
3 152
4 3388
5 85480
6 2642358
7 93830584
8 3870426602
9 179336321514
10 9289851475820
11 529329739784248
12 33294638055400354
13 2251636269472534394
14 165280305640591105462
15 13029806159083867494110
16 1097830097296833990293942

List of values

[0, 12, 152, 3388, 85480, 2642358, 93830584, 3870426602, 179336321514, 9289851475820, 529329739784248, 33294638055400354, 2251636269472534394, 165280305640591105462, 13029806159083867494110, 1097830097296833990293942]

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

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