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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.

A301581 G.f.: Sum_{n>=0} 2^n * ((1+x)^n - 1)^n.

Table of values

n a(n)
0 1
1 2
2 16
3 232
4 4748
5 125440
6 4058312
7 155336672
8 6864980968
9 343995674280
10 19270975801600
11 1193481831243584
12 80966964261458368
13 5971270693661978816
14 475655179279901897536
15 40699219246551726635840
16 3722813577249648564213392
17 362519587815189751405383520
18 37442485808471509306691295808
19 4088344078912544484116541775616
20 470550859964811044524886252649760

List of values

[1, 2, 16, 232, 4748, 125440, 4058312, 155336672, 6864980968, 343995674280, 19270975801600, 1193481831243584, 80966964261458368, 5971270693661978816, 475655179279901897536, 40699219246551726635840, 3722813577249648564213392, 362519587815189751405383520, 37442485808471509306691295808, 4088344078912544484116541775616, 470550859964811044524886252649760]

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

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