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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.

A215052 a(n) = (binomial(n,5) - floor(n/5)) / 5.

Table of values

n a(n)
6 1
7 4
8 11
9 25
10 50
11 92
12 158
13 257
14 400
15 600
16 873
17 1237
18 1713
19 2325
20 3100
21 4069
22 5266
23 6729
24 8500
25 10625
26 13155
27 16145
28 19655
29 23750
30 28500
31 33981
32 40274
33 47466
34 55650
35 64925
36 75397
37 87178
38 100387
39 115150
40 131600
41 149878
42 170132
43 192518
44 217200

List of values

[1, 4, 11, 25, 50, 92, 158, 257, 400, 600, 873, 1237, 1713, 2325, 3100, 4069, 5266, 6729, 8500, 10625, 13155, 16145, 19655, 23750, 28500, 33981, 40274, 47466, 55650, 64925, 75397, 87178, 100387, 115150, 131600, 149878, 170132, 192518, 217200]

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

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