%I
%S 1,2,5,4,7,10,15,8,11,14,13,28,21,78,17,16,19,22,49,42,23,26,1577,40,
%T 33,30,29,44,31,34,39,32,65,38,37,52,115,102,41,242,43,46,51,60,47,
%U 279,395,152,57,114,53,68,85,58,63,104,59,62,61,76,69,126,5773,64,67,1090
%N a(n) = smallest k >= n such that k  (2^k + n).
%C Equally, a(n) = smallest k with 2^k mod k = k  n.
%F a(p2) = p for p prime >= 5; a(2^k) = 2^k.  _David W. Wilson_
%Y Cf. A015910, A036236.
%K nonn
%O 0,2
%A _Robert G. Wilson v_
%E Edited by _N. J. A. Sloane_, Jan 31 2009 at the suggestion of R. J. Mathar and T. D. Noe.
%E Restricted the range of k in the definition  _R. J. Mathar_, Mar 07 2010
