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.

A068884 Largest n-digit triangular number with property that digits alternate in parity, or 0 if no such number exists.

Table of values

n a(n)
1 6
2 78
3 903
4 9870
5 96141
6 941878
7 9850141
8 98947278
9 985036305
10 9892547470
11 98585094741
12 989436909450
13 9898947258903
14 98969892923278
15 989872901298945
16 9898987276765450
17 98985850965876105
18 989898183850729896
19 9898969072503098503

List of values

[6, 78, 903, 9870, 96141, 941878, 9850141, 98947278, 985036305, 9892547470, 98585094741, 989436909450, 9898947258903, 98969892923278, 989872901298945, 9898987276765450, 98985850965876105, 989898183850729896, 9898969072503098503]

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

Content is available under The OEIS End-User License Agreement.