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

1,2

Comments

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

Links

Table of n, a(n) for n=1..45.

Crossrefs

Sequence in context: A032589 A137175 A028375 * A032598 A352141 A110873

Adjacent sequences: A167741 A167742 A167743 * A167745 A167746 A167747

Keyword

base,nonn

Author

Claudio Meller, Nov 10 2009

Extensions

Extended by R. J. Mathar, Nov 12 2009

Status

approved