A167744 Squares that become a prime number when some single digit is inserted in front of its decimal expansion.

1, 9, 49, 81, 121, 169, 289, 361, 441, 529, 729, 841, 961, 1089, 1369, 1521, 1681, 1849, 2209, 2401, 2601, 2809, 3249, 3481, 3721, 3969, 4489, 4761, 5041, 5329, 5929, 6241, 6561, 6889, 7569, 7921, 8281, 8649, 9409, 9801, 10201, 10609, 11449, 11881, 12321

Offset: 1

Author

Claudio Meller, Nov 10 2009

Keywords

• base
• nonn

Comments

The first numbers in A028375 but not in here are 12769, 15129, 18769, 22801, 26569 etc. - R. J. Mathar, Nov 12 2009

Extensions

Extended by R. J. Mathar, Nov 12 2009