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Numbers k such that m*2^k + 1 is prime for exactly one coefficient m in the range 0 <= m <= k.
4

%I #9 Nov 09 2019 03:14:40

%S 1,2,3,4,5,18,21,23,24,26,30,32,34,35,56,57,58,59,69,70,71,87,95,96,

%T 97,106,107,108,109,112,116,120,121,131,137,139,140,142,150,151,156,

%U 159,161,163,171,172,176,177,178,181,191,192,194,195,196,197,212,219,220

%N Numbers k such that m*2^k + 1 is prime for exactly one coefficient m in the range 0 <= m <= k.

%C For corresponding coefficient values see A061413.

%Y Cf. A061410, A061411, A061413, A061414, A061415.

%K nonn

%O 1,2

%A _Patrick De Geest_, May 15 2001

%E Name edited and Offset changed by _Jon E. Schoenfield_, Oct 26 2019