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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.

A084182 a(n) = 3^n + (-1)^n - [1/(n+1)], where [] represents the floor function.

Table of values

n a(n)
0 1
1 2
2 10
3 26
4 82
5 242
6 730
7 2186
8 6562
9 19682
10 59050
11 177146
12 531442
13 1594322
14 4782970
15 14348906
16 43046722
17 129140162
18 387420490
19 1162261466
20 3486784402
21 10460353202
22 31381059610
23 94143178826
24 282429536482
25 847288609442
26 2541865828330
27 7625597484986

List of values

[1, 2, 10, 26, 82, 242, 730, 2186, 6562, 19682, 59050, 177146, 531442, 1594322, 4782970, 14348906, 43046722, 129140162, 387420490, 1162261466, 3486784402, 10460353202, 31381059610, 94143178826, 282429536482, 847288609442, 2541865828330, 7625597484986]

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

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