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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.

A215054 a(n) = 1/11*(binomial(n,11) - floor(n/11)).

Table of values

n a(n)
12 1
13 7
14 33
15 124
16 397
17 1125
18 2893
19 6871
20 15269
21 32065
22 64130
23 122916
24 226922
25 405218
26 702378
27 1185263
28 1952198
29 3145208
30 4966118
31 7697483
32 11729498
33 17594247
34 26008887
35 37929627
36 54618663
37 77726559
38 109392935
39 152368731
40 210163767
41 287223815
42 389141943

List of values

[1, 7, 33, 124, 397, 1125, 2893, 6871, 15269, 32065, 64130, 122916, 226922, 405218, 702378, 1185263, 1952198, 3145208, 4966118, 7697483, 11729498, 17594247, 26008887, 37929627, 54618663, 77726559, 109392935, 152368731, 210163767, 287223815, 389141943]

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

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