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.

A273231 Squares that remain squares if you decrease them by 4 times a repunit with the same number of digits.

Table of values

n a(n)
1 4
2 97344
3 462400
4 473344
5 506944
6 846400
7 78854400
8 444622240000
9 448417729600
10 454125036544
11 551027105344
12 824681934400
13 983984641600
14 460651783840000
15 6703941381760000
16 444446222224000000
17 459134832243732544
18 462218702574222400
19 462583182938702400

List of values

[4, 97344, 462400, 473344, 506944, 846400, 78854400, 444622240000, 448417729600, 454125036544, 551027105344, 824681934400, 983984641600, 460651783840000, 6703941381760000, 444446222224000000, 459134832243732544, 462218702574222400, 462583182938702400]

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

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