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.

A083425 a(n) = (5*5^n + (-1)^n)/6.

Table of values

n a(n)
0 1
1 4
2 21
3 104
4 521
5 2604
6 13021
7 65104
8 325521
9 1627604
10 8138021
11 40690104
12 203450521
13 1017252604
14 5086263021
15 25431315104
16 127156575521
17 635782877604
18 3178914388021
19 15894571940104
20 79472859700521
21 397364298502604
22 1986821492513021
23 9934107462565104

List of values

[1, 4, 21, 104, 521, 2604, 13021, 65104, 325521, 1627604, 8138021, 40690104, 203450521, 1017252604, 5086263021, 25431315104, 127156575521, 635782877604, 3178914388021, 15894571940104, 79472859700521, 397364298502604, 1986821492513021, 9934107462565104]

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

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