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.

A097067 Expansion of g.f. (1-4*x+5*x^2)/(1-2*x)^2.

Table of values

n a(n)
0 1
1 0
2 1
3 4
4 12
5 32
6 80
7 192
8 448
9 1024
10 2304
11 5120
12 11264
13 24576
14 53248
15 114688
16 245760
17 524288
18 1114112
19 2359296
20 4980736
21 10485760
22 22020096
23 46137344
24 96468992
25 201326592
26 419430400
27 872415232
28 1811939328
29 3758096384
30 7784628224
31 16106127360
32 33285996544
33 68719476736

List of values

[1, 0, 1, 4, 12, 32, 80, 192, 448, 1024, 2304, 5120, 11264, 24576, 53248, 114688, 245760, 524288, 1114112, 2359296, 4980736, 10485760, 22020096, 46137344, 96468992, 201326592, 419430400, 872415232, 1811939328, 3758096384, 7784628224, 16106127360, 33285996544, 68719476736]

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

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