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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.

A238454 Difference between 2^(2*n-1) and the next larger square.

Table of values

n a(n)
1 2
2 1
3 4
4 16
5 17
6 68
7 89
8 356
9 697
10 1337
11 2449
12 4001
13 4417
14 17668
15 24329
16 4633
17 18532
18 74128
19 296512
20 1186048
21 1778369
22 1181833
23 4727332
24 18909328
25 28184177
26 17830441
27 71321764
28 285287056
29 381898097
30 9092137
31 36368548
32 145474192
33 581896768
34 2327587072
35 9310348288

List of values

[2, 1, 4, 16, 17, 68, 89, 356, 697, 1337, 2449, 4001, 4417, 17668, 24329, 4633, 18532, 74128, 296512, 1186048, 1778369, 1181833, 4727332, 18909328, 28184177, 17830441, 71321764, 285287056, 381898097, 9092137, 36368548, 145474192, 581896768, 2327587072, 9310348288]

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

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