cp's OEIS Frontend

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.

A011952 Number of Barlow packings with group P3(bar)m1(O) that repeat after 2n layers.

Table of values

n a(n)
4 2
5 3
6 8
7 16
8 40
9 73
10 165
11 320
12 666
13 1323
14 2709
15 5364
16 10880
17 21675
18 43577
19 87040
20 174590
21 348787
22 698709
23 1396736
24 2795400
25 5589672
26 11183445
27 22363920
28 44736510
29 89467563
30 178951005
31 357892096
32 715816960
33 1431611083
34 2863289685
35 5726535661
36 11453200416

List of values

[2, 3, 8, 16, 40, 73, 165, 320, 666, 1323, 2709, 5364, 10880, 21675, 43577, 87040, 174590, 348787, 698709, 1396736, 2795400, 5589672, 11183445, 22363920, 44736510, 89467563, 178951005, 357892096, 715816960, 1431611083, 2863289685, 5726535661, 11453200416]

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

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