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.

A079654 Triangular numbers using only the straight digits 1, 4 and 7.

Table of values

n a(n)
1 1
2 171
3 741
4 1711
5 117144471
6 417417171
7 7417744447141
8 177141144447177414711441
9 1417711714147441711474771771
10 144114474147744777714441111111771711
11 111411774474177744717747747477177774111

List of values

[1, 171, 741, 1711, 117144471, 417417171, 7417744447141, 177141144447177414711441, 1417711714147441711474771771, 144114474147744777714441111111771711, 111411774474177744717747747477177774111]

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

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