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.

A328716 Constant term in the expansion of (1 + x_1 + x_2 + ... + x_n + 1/x_1 + 1/x_2 + ... + 1/x_n)^n.

Table of values

n a(n)
0 1
1 1
2 5
3 19
4 217
5 1451
6 26041
7 249705
8 6116209
9 76432627
10 2373097921
11 36562658573
12 1374991573825
13 25188442156333
14 1112491608614933
15 23620069750701091
16 1198207214200181217
17 28930659427538020915
18 1657461085278025906081
19 44848606508761385855085

List of values

[1, 1, 5, 19, 217, 1451, 26041, 249705, 6116209, 76432627, 2373097921, 36562658573, 1374991573825, 25188442156333, 1112491608614933, 23620069750701091, 1198207214200181217, 28930659427538020915, 1657461085278025906081, 44848606508761385855085]

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

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