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.

A005367 a(n) = 2*(2^n + 1)*(2^(n+1) - 1).

Table of values

n a(n)
0 4
1 18
2 70
3 270
4 1054
5 4158
6 16510
7 65790
8 262654
9 1049598
10 4196350
11 16781310
12 67117054
13 268451838
14 1073774590
15 4295032830
16 17180000254
17 68719738878
18 274878431230
19 1099512676350
20 4398048608254
21 17592190238718
22 70368752566270
23 281474993487870
24 1125899940397054

List of values

[4, 18, 70, 270, 1054, 4158, 16510, 65790, 262654, 1049598, 4196350, 16781310, 67117054, 268451838, 1073774590, 4295032830, 17180000254, 68719738878, 274878431230, 1099512676350, 4398048608254, 17592190238718, 70368752566270, 281474993487870, 1125899940397054]