Indices of tetrahedral numbers that are Fermat pseudoprimes to base 2.

Terms

a(0) =3457a(1) =16705a(2) =21169a(3) =28297a(4) =30577a(5) =45481a(6) =114601a(7) =123121a(8) =127297a(9) =140977a(10) =156601a(11) =159337a(12) =312841a(13) =393121a(14) =418177a(15) =437977a(16) =443017a(17) =453601a(18) =509737a(19) =518017a(20) =521137a(21) =539401a(22) =545161a(23) =545617a(24) =657841a(25) =679297a(26) =704161a(27) =717817a(28) =762121a(29) =775057