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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.

A011845 a(n) = floor( binomial(n,8)/9).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 1
10 5
11 18
12 55
13 143
14 333
15 715
16 1430
17 2701
18 4862
19 8398
20 13996
21 22610
22 35530
23 54479
24 81719
25 120175
26 173586
27 246675
28 345345
29 476905
30 650325
31 876525
32 1168700
33 1542684
34 2017356
35 2615091
36 3362260
37 4289780
38 5433721
39 6835972
40 8544965
41 10616471

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 5, 18, 55, 143, 333, 715, 1430, 2701, 4862, 8398, 13996, 22610, 35530, 54479, 81719, 120175, 173586, 246675, 345345, 476905, 650325, 876525, 1168700, 1542684, 2017356, 2615091, 3362260, 4289780, 5433721, 6835972, 8544965, 10616471]

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

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