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.

A011795 a(n) = floor(C(n,4)/5).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 1
6 3
7 7
8 14
9 25
10 42
11 66
12 99
13 143
14 200
15 273
16 364
17 476
18 612
19 775
20 969
21 1197
22 1463
23 1771
24 2125
25 2530
26 2990
27 3510
28 4095
29 4750
30 5481
31 6293
32 7192
33 8184
34 9275
35 10472
36 11781
37 13209
38 14763
39 16450
40 18278
41 20254
42 22386
43 24682
44 27150
45 29799
46 32637
47 35673
48 38916
49 42375
50 46060
51 49980
52 54145
53 58565
54 63250
55 68211
56 73458
57 79002
58 84854
59 91025
60 97527
61 104371

List of values

[0, 0, 0, 0, 0, 1, 3, 7, 14, 25, 42, 66, 99, 143, 200, 273, 364, 476, 612, 775, 969, 1197, 1463, 1771, 2125, 2530, 2990, 3510, 4095, 4750, 5481, 6293, 7192, 8184, 9275, 10472, 11781, 13209, 14763, 16450, 18278, 20254, 22386, 24682, 27150, 29799, 32637, 35673, 38916, 42375, 46060, 49980, 54145, 58565, 63250, 68211, 73458, 79002, 84854, 91025, 97527, 104371]

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

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