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%I #4 Jul 12 2022 20:55:40
%S -1,0,-1,2,5,11,23,32,47,83,131,239,311,527,731,965,1703,2675,3827,
%T 6359,9659,14555,23087,33041,45995,77519,120467,177635,252713,405317,
%U 554033,795827,1335083,1819523,2491229,4183463,5920211,8051987,12530963,20132057
%N Positions at which powers of 2 occur in A057929. (Or -1 if it does not occur.)
%Y Cf. A057929, A057930.
%K easy,sign
%O 0,4
%A Larry Reeves (larryr(AT)acm.org), Oct 03 2000
%E More terms from _Sean A. Irvine_, Jul 12 2022