Numbers k such that 2^(2^(k-1)-1) == 1 (mod k^2) and 2^(k-1) =/= 1 (mod k).
A376473
Numbers k such that 2^(2^(k-1)-1) == 1 (mod k^2) and 2^(k-1) =/= 1 (mod k).
Terms
- a(0) =951481a(1) =2215441a(2) =28758601a(3) =81844921a(4) =1221936841a(5) =10370479321a(6) =16287076081a(7) =26946809137a(8) =33663998161a(9) =35094800881a(10) =134619011281a(11) =188455112353a(12) =299226038833a(13) =314240366881a(14) =383116075201a(15) =594981050401
External references
- oeis: A376473