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.

A119117 Triangular numbers composed of digits {1,3,7}.

Table of values

n a(n)
1 1
2 3
3 171
4 1711
5 1717731
6 17131731
7 1313137337331
8 117717311713137711
9 773113771333731171
10 3773733771711731311
11 177177371373713177137131
12 311733717173773173111771
13 3311337711173711371777131
14 1173713773733717717113371171

List of values

[1, 3, 171, 1711, 1717731, 17131731, 1313137337331, 117717311713137711, 773113771333731171, 3773733771711731311, 177177371373713177137131, 311733717173773173111771, 3311337711173711371777131, 1173713773733717717113371171]

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

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