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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.

A273160 a(n) = Sum_{k=1..n} C(n, floor((n-k)/k)).

Table of values

n a(n)
0 0
1 1
2 3
3 5
4 10
5 13
6 30
7 39
8 84
9 143
10 290
11 424
12 1120
13 1697
14 3521
15 6633
16 14012
17 22721
18 53529
19 88607
20 189749
21 356024
22 730697
23 1256272
24 2889484
25 5006918
26 10399649
27 19706342
28 40954970
29 72663140
30 160499071
31 286286349
32 597385864
33 1134282375
34 2340807724
35 4251969339

List of values

[0, 1, 3, 5, 10, 13, 30, 39, 84, 143, 290, 424, 1120, 1697, 3521, 6633, 14012, 22721, 53529, 88607, 189749, 356024, 730697, 1256272, 2889484, 5006918, 10399649, 19706342, 40954970, 72663140, 160499071, 286286349, 597385864, 1134282375, 2340807724, 4251969339]

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

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