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.

A129683 Expansion of (1/(1-2x))*exp(2x/(1-2x)).

Table of values

n a(n)
0 1
1 4
2 28
3 272
4 3344
5 49472
6 852928
7 16758016
8 369082624
9 8996922368
10 240294124544
11 6974172532736
12 218457925292032
13 7342688736329728
14 263513011737051136
15 10054112734940561408
16 406301504472849907712
17 17333090863574658842624
18 778298003006760943353856

List of values

[1, 4, 28, 272, 3344, 49472, 852928, 16758016, 369082624, 8996922368, 240294124544, 6974172532736, 218457925292032, 7342688736329728, 263513011737051136, 10054112734940561408, 406301504472849907712, 17333090863574658842624, 778298003006760943353856]

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

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