Brilliant numbers (A078972) whose digit reversal is a pentagonal number (A000326).

Terms

a(0) =10a(1) =15a(2) =21a(3) =517a(4) =529a(5) =671a(6) =1513a(7) =6241a(8) =15251a(9) =23129a(10) =27161a(11) =53297a(12) =59701a(13) =79091a(14) =104977a(15) =299911a(16) =559411a(17) =575051a(18) =597557a(19) =1560101a(20) =2178727a(21) =2273641a(22) =2390393a(23) =2966429a(24) =5354893a(25) =5429329a(26) =5435761a(27) =5613197a(28) =5664721a(29) =5988449