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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.

A366978 a(n) = Sum_{j=1..n} binomial(floor(n/j)+n,n+1).

Table of values

n a(n)
1 1
2 5
3 17
4 64
5 220
6 839
7 3061
8 11684
9 44126
10 169432
11 648589
12 2505411
13 9670165
14 37497431
15 145502481
16 566076182
17 2204451031
18 8599761208
19 33581164151
20 131296796355
21 513812162117
22 2012709456997
23 7890502860027
24 30958303856804
25 121549519502347
26 477555096290870
27 1877411492125154

List of values

[1, 5, 17, 64, 220, 839, 3061, 11684, 44126, 169432, 648589, 2505411, 9670165, 37497431, 145502481, 566076182, 2204451031, 8599761208, 33581164151, 131296796355, 513812162117, 2012709456997, 7890502860027, 30958303856804, 121549519502347, 477555096290870, 1877411492125154]

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

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