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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.

A365439 a(n) = Sum_{k=1..n} binomial(floor(n/k)+4,5).

Table of values

n a(n)
1 1
2 7
3 23
4 64
5 135
6 282
7 493
8 864
9 1375
10 2166
11 3168
12 4715
13 6536
14 9132
15 12278
16 16525
17 21371
18 27998
19 35314
20 44995
21 55847
22 69504
23 84455
24 103882
25 124428
26 150005
27 177921
28 212017
29 247978
30 292890
31 339267
32 395874
33 455796
34 526692
35 600788
36 691066
37 782457
38 891048
39 1004814

List of values

[1, 7, 23, 64, 135, 282, 493, 864, 1375, 2166, 3168, 4715, 6536, 9132, 12278, 16525, 21371, 27998, 35314, 44995, 55847, 69504, 84455, 103882, 124428, 150005, 177921, 212017, 247978, 292890, 339267, 395874, 455796, 526692, 600788, 691066, 782457, 891048, 1004814]

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

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