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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.

A173693 a(n) = ceiling(A107293(n)/2).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 1
6 1
7 1
8 2
9 2
10 3
11 5
12 7
13 10
14 14
15 20
16 28
17 41
18 59
19 85
20 122
21 176
22 254
23 367
24 529
25 764
26 1102
27 1591
28 2296
29 3313
30 4782
31 6901
32 9960
33 14375
34 20747
35 29944
36 43217
37 62373
38 90021
39 129925
40 187516
41 270636
42 390601
43 563742
44 813631
45 1174288
46 1694813
47 2446070

List of values

[0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 5, 7, 10, 14, 20, 28, 41, 59, 85, 122, 176, 254, 367, 529, 764, 1102, 1591, 2296, 3313, 4782, 6901, 9960, 14375, 20747, 29944, 43217, 62373, 90021, 129925, 187516, 270636, 390601, 563742, 813631, 1174288, 1694813, 2446070]

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

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