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.

A153311 Coefficient triangle sequence of a polynomial recursion: p(x,n)=(x + 1)*(p(x, n - 1) + 3^(n - 2)*(x + x^Floor[n/2] + x^(n - 2))); Row sums are 2*3^n.

Table of values

n a(n)
0 2
1 3
2 3
3 2
4 14
5 2
6 2
7 25
8 25
9 2
10 2
11 36
12 77
13 45
14 2
15 2
16 65
17 167
18 176
19 74
20 2
21 2
22 148
23 313
24 424
25 412
26 157
27 2
28 2
29 393
30 704
31 980
32 1079
33 812
34 402
35 2
36 2
37 1124
38 1826
39 1684
40 2788
41 2620
42 1943
43 1133
44 2
45 2
46 3313
47 5137
48 3510
49 6659
50 7595
51 4563
52 5263
53 3322
54 2
55 2
56 9876
57 15011
58 8647

List of values

[2, 3, 3, 2, 14, 2, 2, 25, 25, 2, 2, 36, 77, 45, 2, 2, 65, 167, 176, 74, 2, 2, 148, 313, 424, 412, 157, 2, 2, 393, 704, 980, 1079, 812, 402, 2, 2, 1124, 1826, 1684, 2788, 2620, 1943, 1133, 2, 2, 3313, 5137, 3510, 6659, 7595, 4563, 5263, 3322, 2, 2, 9876, 15011, 8647]