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.

A011954 Barlow packings with group R3(bar)m(SO) that repeat after 6n+3 layers.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 11
5 20
6 42
7 84
8 170
9 340
10 682
11 1364
12 2728
13 5461
14 10922
15 21844
16 43690
17 87374
18 174762
19 349524
20 699050
21 1398100
22 2796192
23 5592404
24 11184806
25 22369620
26 44739242
27 89478462
28 178956970
29 357913940
30 715827882
31 1431655754
32 2863311486
33 5726623060
34 11453246122
35 22906492244
36 45812984490

List of values

[1, 1, 2, 4, 11, 20, 42, 84, 170, 340, 682, 1364, 2728, 5461, 10922, 21844, 43690, 87374, 174762, 349524, 699050, 1398100, 2796192, 5592404, 11184806, 22369620, 44739242, 89478462, 178956970, 357913940, 715827882, 1431655754, 2863311486, 5726623060, 11453246122, 22906492244, 45812984490]

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

Content is available under The OEIS End-User License Agreement.