A052009 Sum of 'n with digits sorted ascending' and 'n with digits sorted descending' is prime.

1, 10, 100, 107, 109, 116, 118, 146, 158, 161, 164, 166, 170, 178, 181, 185, 187, 188, 190, 229, 239, 245, 254, 257, 269, 275, 277, 292, 293, 296, 299, 329, 338, 344, 356, 365, 368, 383, 386, 392, 407, 416, 425, 434, 443, 452, 455, 461, 467, 469, 470, 476

Offset: 0

Author

Patrick De Geest, Nov 15 1999

Keywords

• nonn
• base

Examples

			107 is a term because 017 + 710 = 727 is prime.
		

Crossrefs

Cf. A052008.