A115679 Brilliant numbers (A078972) whose digit reversal is a pentagonal number (A000326).
10, 15, 21, 517, 529, 671, 1513, 6241, 15251, 23129, 27161, 53297, 59701, 79091, 104977, 299911, 559411, 575051, 597557, 1560101, 2178727, 2273641, 2390393, 2966429, 5354893, 5429329, 5435761, 5613197, 5664721, 5988449, 6218521
Offset: 1
Examples
1513=17*89 is brilliant and 3151 is the 46th pentagonal number.