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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.

A261510 Triangle-congruent primes greater than 10 with a single digit at the center.

Table of values

n a(n)
1 1111211111
2 1111411111
3 3333133333
4 9999499999
5 1111111111112111111111111111
6 1111311331137311333311111111
7 1111411441142411444411111111
8 1111611661167611666611111111
9 1111811881185811888811111111
10 3333033003305033000033333333
11 3333133113312133111133333333

List of values

[1111211111, 1111411111, 3333133333, 9999499999, 1111111111112111111111111111, 1111311331137311333311111111, 1111411441142411444411111111, 1111611661167611666611111111, 1111811881185811888811111111, 3333033003305033000033333333, 3333133113312133111133333333]

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

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