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.

A161142 Numbers which can be expressed as the product of numbers made of only fours.

Table of values

n a(n)
1 1
2 4
3 16
4 44
5 64
6 176
7 256
8 444
9 704
10 1024
11 1776
12 1936
13 2816
14 4096
15 4444
16 7104
17 7744
18 11264
19 16384
20 17776
21 19536
22 28416
23 30976
24 44444
25 45056
26 65536
27 71104
28 78144
29 85184
30 113664
31 123904
32 177776
33 180224
34 195536
35 197136
36 262144
37 284416
38 312576

List of values

[1, 4, 16, 44, 64, 176, 256, 444, 704, 1024, 1776, 1936, 2816, 4096, 4444, 7104, 7744, 11264, 16384, 17776, 19536, 28416, 30976, 44444, 45056, 65536, 71104, 78144, 85184, 113664, 123904, 177776, 180224, 195536, 197136, 262144, 284416, 312576]

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

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