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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.

A370371 Largest m such that any two consecutive digits of the base-n expansion of m^2 differ by 1 after arranging the digits in decreasing order.

Table of values

n a(n)
2 1
3 1
4 15
5 2
6 195
7 867
8 3213
9 18858
10 99066
11 528905
12 2950717
13 294699
14 105011842
15 659854601
16 4285181505
17 1578809181
18 198009443151
19 1404390324525
20 10225782424031
21 3635290739033
22 583655347579584
23 4564790605900107
24 36485812146621733
25 297764406866494254
26 2479167155959358950

List of values

[1, 1, 15, 2, 195, 867, 3213, 18858, 99066, 528905, 2950717, 294699, 105011842, 659854601, 4285181505, 1578809181, 198009443151, 1404390324525, 10225782424031, 3635290739033, 583655347579584, 4564790605900107, 36485812146621733, 297764406866494254, 2479167155959358950]

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

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