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.

A190074 Number of arrangements of 5 nonzero numbers x(i) in -n..n with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero.

Table of values

n a(n)
1 12
2 144
3 922
4 3481
5 9904
6 23400
7 48491
8 92478
9 162599
10 270267
11 430274
12 655974
13 965098
14 1390174
15 1947527
16 2667906
17 3590889
18 4753865
19 6198717
20 7979654
21 10128692
22 12732119
23 15867500
24 19571053
25 23904927
26 29021539
27 34967650
28 41839570
29 49768153

List of values

[12, 144, 922, 3481, 9904, 23400, 48491, 92478, 162599, 270267, 430274, 655974, 965098, 1390174, 1947527, 2667906, 3590889, 4753865, 6198717, 7979654, 10128692, 12732119, 15867500, 19571053, 23904927, 29021539, 34967650, 41839570, 49768153]