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.

A189500 Number of arrangements of 4 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 42
3 152
4 462
5 1088
6 2128
7 3850
8 6474
9 10126
10 15224
11 22180
12 30900
13 42164
14 56514
15 73816
16 94984
17 120700
18 150836
19 186756
20 228696
21 276618
22 332204
23 396444
24 467948
25 549504
26 642000
27 744978
28 859846
29 988550
30 1129542
31 1286278
32 1458874
33 1646896

List of values

[0, 42, 152, 462, 1088, 2128, 3850, 6474, 10126, 15224, 22180, 30900, 42164, 56514, 73816, 94984, 120700, 150836, 186756, 228696, 276618, 332204, 396444, 467948, 549504, 642000, 744978, 859846, 988550, 1129542, 1286278, 1458874, 1646896]

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

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