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.

A273233 Squares that remain squares if you decrease them by 7 times a repunit with the same number of digits.

Table of values

n a(n)
1 81
2 841
3 7921
4 77841
5 790321
6 863041
7 982081
8 9991921
9 79014321
10 80299521
11 94653441
12 7901254321
13 8635799041
14 778133930161
15 790123654321
16 794396081521
17 816057482881
18 965485073281
19 989863816561
20 79012347654321
21 86358529399041
22 857789228465521
23 7901234587654321
24 8547733055510401

List of values

[81, 841, 7921, 77841, 790321, 863041, 982081, 9991921, 79014321, 80299521, 94653441, 7901254321, 8635799041, 778133930161, 790123654321, 794396081521, 816057482881, 965485073281, 989863816561, 79012347654321, 86358529399041, 857789228465521, 7901234587654321, 8547733055510401]

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

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