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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.

A173508 a(n) = ceiling(A173497(n)/2).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 2
5 3
6 4
7 6
8 8
9 11
10 15
11 20
12 28
13 38
14 52
15 71
16 97
17 132
18 181
19 247
20 337
21 461
22 629
23 860
24 1174
25 1604
26 2191
27 2993
28 4089
29 5585
30 7630
31 10422
32 14237
33 19448
34 26567
35 36291
36 49574
37 67720
38 92507
39 126367
40 172620
41 235804
42 322114

List of values

[1, 1, 1, 2, 2, 3, 4, 6, 8, 11, 15, 20, 28, 38, 52, 71, 97, 132, 181, 247, 337, 461, 629, 860, 1174, 1604, 2191, 2993, 4089, 5585, 7630, 10422, 14237, 19448, 26567, 36291, 49574, 67720, 92507, 126367, 172620, 235804, 322114]

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

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