Euler pseudoprimes to base 5: composite integers such that abs(5^((n - 1)/2)) == 1 mod n.

Terms

a(0) =217a(1) =781a(2) =1541a(3) =1729a(4) =5461a(5) =5611a(6) =6601a(7) =7449a(8) =7813a(9) =11041a(10) =12801a(11) =13021a(12) =13333a(13) =14981a(14) =15751a(15) =15841a(16) =16297a(17) =21361a(18) =23653a(19) =24211a(20) =25351a(21) =29539a(22) =30673a(23) =38081a(24) =40501a(25) =41041a(26) =44173a(27) =44801a(28) =46657a(29) =47641