A173153 - OEIS

%I #14 Mar 09 2022 09:26:55

%S 1,3,4,5,7,8,9,10,11,13,14,15,16,17,19,21,22,23,24,25,27,28,29,31,33,

%T 34,35,36,37,39,43,45,46,47,50,51,52,53,54,55,56,57,58,59,61,63,64,67,

%U 69,70,71,73,74,75,77,78,79,80,83,85,88,92,93,94,95,96,97,99,100,101,103

%N Values of n such that either {0,1}*n^2+n+41 is prime.

%F a(n) ~ n log n. - _Charles R Greathouse IV_, May 25 2011

%e 1 is a term because 0*1^2+1+41=42=nonprime and 1*1^2+1+41=43=prime.

%e 56 is a term because 0*56^2+56+41=97=prime and 1*56^2+56+41=3233=nonprime.

%K nonn,easy

%O 1,2

%A _Juri-Stepan Gerasimov_, Feb 11 2010

%E 50, 57 inserted, 90 and 98 removed by _R. J. Mathar_, Mar 09 2010