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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.

A048346 a(n)^2 is the smallest square containing exactly n 1's in its decimal notation.

Table of values

n a(n)
0 0
1 1
2 11
3 109
4 1054
5 3381
6 10541
7 105414
8 414139
9 1055041
10 10252371
11 78173596
12 334082481
13 1187901979
14 1055036071
15 33333407869
16 105409293239
17 718412219489
18 1054501356619
19 10536182856619
20 105409445099152
21 333331983425106
22 1054092079569499
23 10541257568071331
24 37564758898655414
25 33333331983425106

List of values

[0, 1, 11, 109, 1054, 3381, 10541, 105414, 414139, 1055041, 10252371, 78173596, 334082481, 1187901979, 1055036071, 33333407869, 105409293239, 718412219489, 1054501356619, 10536182856619, 105409445099152, 333331983425106, 1054092079569499, 10541257568071331, 37564758898655414, 33333331983425106]

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

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