Nonprimes in A078447.

Terms

a(0) =1a(1) =689a(2) =15229a(3) =20569a(4) =24139a(5) =43531a(6) =44377a(7) =47077a(8) =47941a(9) =66767a(10) =73441a(11) =80419a(12) =86447a(13) =117739a(14) =164783a(15) =175793a(16) =192433a(17) =194321a(18) =196283a(19) =261853a(20) =282533a(21) =302083a(22) =316933a(23) =319373a(24) =372091a(25) =380431a(26) =414863a(27) =429713a(28) =444361a(29) =450613