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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.

A175991 a(n) = binomial(binomial(binomial(n, 2), 3), 4)/5.

Table of values

n a(n)
4 969
5 1642914
6 352470391
7 25957590316
8 958073067315
9 21639468423573
10 337726148030733
11 3946787095970862
12 36534727415378192
13 279109860906071195
14 1815047255456722287
15 10290566991057546557
16 51837653320551263438
17 235568544405588437778
18 977816056476957297015
19 3745739023587032569461
20 13356862465688668653111

List of values

[969, 1642914, 352470391, 25957590316, 958073067315, 21639468423573, 337726148030733, 3946787095970862, 36534727415378192, 279109860906071195, 1815047255456722287, 10290566991057546557, 51837653320551263438, 235568544405588437778, 977816056476957297015, 3745739023587032569461, 13356862465688668653111]

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

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