%I A031884
%S A031884 1,3,15,79,141,51,787,495,171,937,903,745,2851,1611,1057,3811,5769,4893,
%T A031884 8719,10683,9841,24073,9567,28245,25687,3507,26943,35743,44805,51979,
%U A031884 64723,23205,50779,51475,264075,155833,238057,178755,143311,400591
%N A031884 Smaller of a pair of consecutive lucky numbers with a gap of 2n.
%C A031884 a(n) is the first occurrence of a difference of 2n between A000959(k+1) 
               and A000959(k). - Robert G. Wilson v (rgwv(at)rgwv.com), May 12 2006
%t A031884 lst = Range[1, 10^6, 2]; i = 2; While[ i <= (len = Length@lst) && (k 
               = lst[[i]]) <= len, lst = Drop[lst, {k, len, k}]; i++ ]; f[n_] := 
               Block[{k = 1}, While[t[[k + 1]] - t[[k]] != 2n, k++ ]; t[[k]]]; Array[f, 
               41] (* Robert G. Wilson v *)
%Y A031884 Cf. A000959, A031885, A031883, A031158, A031886, A031888, A031890, A031892, 
               A031894, A031896, A031898, A031900, A031902.
%Y A031884 Sequence in context: A026115 A027911 A104530 this_sequence A052755 A137957 
               A002514
%Y A031884 Adjacent sequences: A031881 A031882 A031883 this_sequence A031885 A031886 
               A031887
%K A031884 nonn
%O A031884 1,2
%A A031884 Patrick De Geest (pdg(AT)worldofnumbers.com)
%E A031884 More terms from Robert G. Wilson v (rgwv(at)rgwv.com), May 12 2006