Composite numbers k such that k-1 divides 2^k-2.

Terms

a(0) =55a(1) =295a(2) =343a(3) =1027a(4) =1135a(5) =1315a(6) =1807a(7) =2059a(8) =2395a(9) =3403a(10) =4375a(11) =5335a(12) =6175a(13) =6499a(14) =7183a(15) =7939a(16) =9235a(17) =10207a(18) =12643a(19) =13123a(20) =14155a(21) =16003a(22) =16255a(23) =19495a(24) =21547a(25) =23815a(26) =27595a(27) =27703a(28) =30619a(29) =35479