Odd numbers n divisible by 3 such that for all k >= 1 the numbers n*4^k + 1 are composite.

Terms

a(0) =66741a(1) =308481a(2) =436029a(3) =636921a(4) =1259541a(5) =1384059a(6) =1997589a(7) =2038371a(8) =2397951a(9) =2473929a(10) =2965569a(11) =3885579a(12) =3999399a(13) =4210989a(14) =4303311a(15) =4693701a(16) =4942311a(17) =5067669a(18) =5247051a(19) =5367729a(20) =5643249a(21) =5859369a(22) =6269871a(23) =6385419a(24) =6467361a(25) =6660261a(26) =6826329a(27) =7336521a(28) =8302269a(29) =9026541