A115687 Powerful(1) numbers (A001694) whose digit reversal is a semiprime (A001358).

4, 9, 49, 64, 121, 169, 289, 400, 512, 625, 900, 961, 968, 1156, 1225, 1568, 1849, 2048, 2401, 2888, 3125, 3136, 3364, 3481, 3721, 4000, 4900, 4913, 5041, 5329, 5408, 6400, 6859, 6889, 7396, 8192, 8575, 9000, 9604, 10201, 10648, 10816, 10952

Offset: 1

Author

Giovanni Resta, Jan 31 2006

Keywords

• nonn
• base

Examples

			968=2^3*11^2 is powerful and 869=11*79 is semiprime.
		

Links

• Index entries for sequences related to powerful numbers

Crossrefs

Cf. A001358, A001694, A115688.