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.

A068883 Smallest n-digit triangular numbers with property that digits alternate in parity, or 0 if no such number exists.

Table of values

n a(n)
1 1
2 10
3 105
4 1830
5 10585
6 107416
7 1038961
8 10109256
9 101410161
10 1014503490
11 10143650961
12 101072103210
13 1012143638925
14 10101274165450
15 101014143472945
16 1010363290981278
17 10101078125834905
18 101012169252147076
19 1010125816103490141

List of values

[1, 10, 105, 1830, 10585, 107416, 1038961, 10109256, 101410161, 1014503490, 10143650961, 101072103210, 1012143638925, 10101274165450, 101014143472945, 1010363290981278, 10101078125834905, 101012169252147076, 1010125816103490141]

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

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