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.

A367209 Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 1 + 4*x, p(n,x) = u*p(n-1,x) + v*p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - x - x^2.

Table of values

n a(n)
1 1
2 1
3 4
4 2
5 7
6 15
7 3
8 18
9 38
10 56
11 5
12 35
13 116
14 186
15 209
16 8
17 70
18 273
19 650
20 859
21 780
22 13
23 132
24 629
25 1777
26 3366
27 3821
28 2911
29 21
30 246
31 1352
32 4600
33 10410
34 16556
35 16556
36 10864
37 34
38 449
39 2820
40 11024
41 29770
42 56874
43 78504
44 70356
45 40545
46 55
47 810
48 5701
49 25306
50 78324

List of values

[1, 1, 4, 2, 7, 15, 3, 18, 38, 56, 5, 35, 116, 186, 209, 8, 70, 273, 650, 859, 780, 13, 132, 629, 1777, 3366, 3821, 2911, 21, 246, 1352, 4600, 10410, 16556, 16556, 10864, 34, 449, 2820, 11024, 29770, 56874, 78504, 70356, 40545, 55, 810, 5701, 25306, 78324]