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.

A054887 Layer counting sequence for hyperbolic tessellation by cuspidal triangles of angles (Pi/3, Pi/5, Pi/7).

Table of values

n a(n)
1 1
2 3
3 6
4 11
5 20
6 36
7 64
8 113
9 200
10 354
11 626
12 1107
13 1958
14 3464
15 6128
16 10839
17 19172
18 33913
19 59988
20 106111
21 187696
22 332009
23 587280
24 1038820
25 1837534
26 3250353
27 5749442
28 10169998
29 17989372
30 31820803
31 56286764
32 99563792
33 176115092

List of values

[1, 3, 6, 11, 20, 36, 64, 113, 200, 354, 626, 1107, 1958, 3464, 6128, 10839, 19172, 33913, 59988, 106111, 187696, 332009, 587280, 1038820, 1837534, 3250353, 5749442, 10169998, 17989372, 31820803, 56286764, 99563792, 176115092]

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

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