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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.

A034991 Smallest square starting with a string of n 7's.

Table of values

n a(n)
1 729
2 7744
3 777924
4 77774761
5 77777400996
6 777777594889
7 77777777127241
8 77777777127241
9 7777777771566496516
10 7777777777144230025
11 777777777770200337601
12 777777777777430543201344
13 77777777777778331004281924
14 77777777777777489970787004164
15 7777777777777771308012741325056
16 777777777777777744351960257494201
17 7777777777777777716034080781138596

List of values

[729, 7744, 777924, 77774761, 77777400996, 777777594889, 77777777127241, 77777777127241, 7777777771566496516, 7777777777144230025, 777777777770200337601, 777777777777430543201344, 77777777777778331004281924, 77777777777777489970787004164, 7777777777777771308012741325056, 777777777777777744351960257494201, 7777777777777777716034080781138596]

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

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