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.

A155485 a(n) = 5^n + (1 - 4^n)/3.

Table of values

n a(n)
0 1
1 4
2 20
3 104
4 540
5 2784
6 14260
7 72664
8 368780
9 1865744
10 9416100
11 47430024
12 238548220
13 1198333504
14 6014037140
15 30159664184
16 151156234860
17 757212830064
18 3791790773380
19 18981860359144
20 95000927764700
21 475371142699424
22 2378321729000820
23 11897472707018904

List of values

[1, 4, 20, 104, 540, 2784, 14260, 72664, 368780, 1865744, 9416100, 47430024, 238548220, 1198333504, 6014037140, 30159664184, 151156234860, 757212830064, 3791790773380, 18981860359144, 95000927764700, 475371142699424, 2378321729000820, 11897472707018904]

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

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