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.

A304723 a(n) = 5^(n-1)*(3^n - 1)/2.

Table of values

n a(n)
0 0
1 1
2 20
3 325
4 5000
5 75625
6 1137500
7 17078125
8 256250000
9 3844140625
10 57664062500
11 864970703125
12 12974609375000
13 194619384765625
14 2919291992187500
15 43789385986328125
16 656840820312500000
17 9852612457275390625
18 147789187622070312500
19 2216837818145751953125
20 33252567291259765625000

List of values

[0, 1, 20, 325, 5000, 75625, 1137500, 17078125, 256250000, 3844140625, 57664062500, 864970703125, 12974609375000, 194619384765625, 2919291992187500, 43789385986328125, 656840820312500000, 9852612457275390625, 147789187622070312500, 2216837818145751953125, 33252567291259765625000]

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

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