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.

A003665 a(n) = 2^(n-1)*( 2^n + (-1)^n ).

Table of values

n a(n)
0 1
1 1
2 10
3 28
4 136
5 496
6 2080
7 8128
8 32896
9 130816
10 524800
11 2096128
12 8390656
13 33550336
14 134225920
15 536854528
16 2147516416
17 8589869056
18 34359869440
19 137438691328
20 549756338176
21 2199022206976
22 8796095119360
23 35184367894528
24 140737496743936
25 562949936644096
26 2251799847239680

List of values

[1, 1, 10, 28, 136, 496, 2080, 8128, 32896, 130816, 524800, 2096128, 8390656, 33550336, 134225920, 536854528, 2147516416, 8589869056, 34359869440, 137438691328, 549756338176, 2199022206976, 8796095119360, 35184367894528, 140737496743936, 562949936644096, 2251799847239680]

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

Content is available under The OEIS End-User License Agreement.