Pentagonal numbers (A000326) that are also brilliant numbers (A078972).

Terms

a(0) =35a(1) =247a(2) =1247a(3) =2501a(4) =4187a(5) =15251a(6) =17767a(7) =33227a(8) =49051a(9) =63551a(10) =68587a(11) =71177a(12) =76501a(13) =81317a(14) =96647a(15) =112477a(16) =118301a(17) =128627a(18) =147737a(19) =159251a(20) =182527a(21) =241001a(22) =250717a(23) =265651a(24) =302177a(25) =318551a(26) =438751a(27) =485357a(28) =563347a(29) =655051