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.

A218731 a(n) = (28^n - 1)/27.

Table of values

n a(n)
0 0
1 1
2 29
3 813
4 22765
5 637421
6 17847789
7 499738093
8 13992666605
9 391794664941
10 10970250618349
11 307167017313773
12 8600676484785645
13 240818941573998061
14 6742930364071945709
15 188802050194014479853
16 5286457405432405435885
17 148020807352107352204781
18 4144582605859005861733869

List of values

[0, 1, 29, 813, 22765, 637421, 17847789, 499738093, 13992666605, 391794664941, 10970250618349, 307167017313773, 8600676484785645, 240818941573998061, 6742930364071945709, 188802050194014479853, 5286457405432405435885, 148020807352107352204781, 4144582605859005861733869]

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

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