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.

A133156 Irregular triangle read by rows: coefficients of U(n,x), Chebyshev polynomials of the second kind with exponents in decreasing order.

Table of values

n a(n)
0 1
1 2
2 4
3 -1
4 8
5 -4
6 16
7 -12
8 1
9 32
10 -32
11 6
12 64
13 -80
14 24
15 -1
16 128
17 -192
18 80
19 -8
20 256
21 -448
22 240
23 -40
24 1
25 512
26 -1024
27 672
28 -160
29 10
30 1024
31 -2304
32 1792
33 -560
34 60
35 -1
36 2048
37 -5120
38 4608
39 -1792
40 280
41 -12
42 4096
43 -11264
44 11520
45 -5376
46 1120
47 -84
48 1

List of values

[1, 2, 4, -1, 8, -4, 16, -12, 1, 32, -32, 6, 64, -80, 24, -1, 128, -192, 80, -8, 256, -448, 240, -40, 1, 512, -1024, 672, -160, 10, 1024, -2304, 1792, -560, 60, -1, 2048, -5120, 4608, -1792, 280, -12, 4096, -11264, 11520, -5376, 1120, -84, 1]