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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.

A375541 a(n) = 2^n * n! * [x^n] (-1/2 - exp(-x))^n.

Table of values

n a(n)
0 1
1 2
2 20
3 318
4 7080
5 202650
6 7089516
7 293122998
8 13984363728
9 756140833458
10 45695657262420
11 3052241497352718
12 223293580147036152
13 17756185491727424586
14 1524930579202933587132
15 140665424413881644688870
16 13870450317973173165542304
17 1455954744856343617306729314

List of values

[1, 2, 20, 318, 7080, 202650, 7089516, 293122998, 13984363728, 756140833458, 45695657262420, 3052241497352718, 223293580147036152, 17756185491727424586, 1524930579202933587132, 140665424413881644688870, 13870450317973173165542304, 1455954744856343617306729314]

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

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