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.

A321959 a(n) = [x^n] ((1 - x)*x)/((1 - 2*x)^2*(2*x^2 - 2*x + 1)).

Table of values

n a(n)
0 0
1 1
2 5
3 16
4 42
5 100
6 228
7 512
8 1144
9 2544
10 5616
11 12288
12 26656
13 57408
14 122944
15 262144
16 556928
17 1179392
18 2490112
19 5242880
20 11010560
21 23069696
22 48235520
23 100663296
24 209713152
25 436203520
26 905965568
27 1879048192
28 3892322304
29 8053080064
30 16643014656
31 34359738368

List of values

[0, 1, 5, 16, 42, 100, 228, 512, 1144, 2544, 5616, 12288, 26656, 57408, 122944, 262144, 556928, 1179392, 2490112, 5242880, 11010560, 23069696, 48235520, 100663296, 209713152, 436203520, 905965568, 1879048192, 3892322304, 8053080064, 16643014656, 34359738368]