Brilliant numbers k such that 2k+1 is also brilliant.

Terms

a(0) =4a(1) =10a(2) =533a(3) =671a(4) =869a(5) =1139a(6) =2279a(7) =14873a(8) =17819a(9) =20651a(10) =22523a(11) =23129a(12) =23381a(13) =25199a(14) =28013a(15) =28943a(16) =31439a(17) =31571a(18) =33899a(19) =35369a(20) =35621a(21) =37241a(22) =37403a(23) =39059a(24) =39449a(25) =41291a(26) =42401a(27) =42431a(28) =42881a(29) =43259