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

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

Offset: 1

Author

Felix Fröhlich, Aug 22 2015

Keywords

• nonn
• base

Comments

Subsequence of A050758.

Examples

			a(6) can be represented as follows:
......1
.....1 1
....1 3 1
...1 3 3 1
..1 3 7 3 1
.1 3 3 3 3 1
1 1 1 1 1 1 1
		

Links

• G. L. Honaker, Jr. and C. Caldwell, 1111211111

Crossrefs

Cf. A050758.