A115703 Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1.

12, 22, 51, 210, 330, 425, 1162, 2882, 3876, 4510, 6902, 8400, 9801, 14652, 15251, 22632, 27270, 29330, 32340, 52360, 54055, 55777, 58707, 66676, 68587, 104412, 197472, 217551, 279720, 298151, 319935, 341055, 448540, 468442, 481950

Offset: 1

Author

Giovanni Resta, Jan 31 2006

Keywords

• nonn
• base

Examples

			14652 is the 99th pentagonal number and 25641=77*333.
		

Crossrefs

Cf. A000326, A115683.