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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.

A127222 a(n) = 3^n*pentanacci(n) or (3^n)*A023424(n-1).

Table of values

n a(n)
1 3
2 27
3 189
4 1215
5 7533
6 41553
7 247131
8 1463103
9 8640837
10 50959287
11 300264165
12 1771292853
13 10447598619
14 61618989627
15 363414767589
16 2143339285311
17 12641143135581
18 74555586323649
19 439717218548643
20 2593383067853775
21 15295369041550269
22 90209719910309895

List of values

[3, 27, 189, 1215, 7533, 41553, 247131, 1463103, 8640837, 50959287, 300264165, 1771292853, 10447598619, 61618989627, 363414767589, 2143339285311, 12641143135581, 74555586323649, 439717218548643, 2593383067853775, 15295369041550269, 90209719910309895]

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

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