Fermat pseudoprimes to base 2 that are octadecagonal.

Terms

a(0) =8481a(1) =14491a(2) =29341a(3) =62745a(4) =196093a(5) =396271a(6) =526593a(7) =2184571a(8) =2513841a(9) =5256091a(10) =7017193a(11) =8137585a(12) =13448593a(13) =15247621a(14) =16053193a(15) =16879501a(16) =18740971a(17) =20494401a(18) =29878381a(19) =33704101a(20) =35703361a(21) =36724591a(22) =41607721a(23) =42709591a(24) =69741001a(25) =70593931a(26) =80927821a(27) =82976181