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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.

A081685 a(n) = 6^n - 5^n - 4^n - 3^n + 3*2^n.

Table of values

n a(n)
0 1
1 0
2 -2
3 24
4 382
5 3480
6 26398
7 183624
8 1217662
9 7844280
10 49595998
11 309603624
12 1915345342
13 11771312280
14 71987479198
15 438579414024
16 2664184199422
17 16146411375480
18 97676153291998
19 590010215086824
20 3559688013155902
21 21455704981601880
22 129219894496730398
23 777738831236334024

List of values

[1, 0, -2, 24, 382, 3480, 26398, 183624, 1217662, 7844280, 49595998, 309603624, 1915345342, 11771312280, 71987479198, 438579414024, 2664184199422, 16146411375480, 97676153291998, 590010215086824, 3559688013155902, 21455704981601880, 129219894496730398, 777738831236334024]

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

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