%I A047566
%S A047566 4,5,6,7,12,13,14,15,20,21,22,23,28,29,30,31,36,37,38,39,44,45,46,47,
%T A047566 52,53,54,55,60,61,62,63,68,69,70,71,76,77,78,79,84,85,86,87,92,93,94,
%U A047566 95,100,101,102,103,108,109
%N A047566 Numbers that are congruent to {4, 5, 6, 7} mod 8.
%C A047566 Numbers having a 1 in position 2 of their binary expansion. One of the 
               mystery calculator sequences: A005408, A042964, A047566, A115419, 
               A115420, A115421. - Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), 
               Jan 22 2006
%H A047566 Maths Magic, <a href="http://www.mathsyear2000.org/explorer/mathsmagic/
               realmystery/">Mystery Calculator</a>.
%F A047566 a(n)=(1/3)*{5*(n mod 4)+2*[(n+1) mod 4]+2*[(n+2) mod 4]+2*[(n+3) mod 
               4]} + 8*A002265 - Paolo P. Lava (ppl(AT)spl.at), Feb 15 2008
%Y A047566 Sequence in context: A014098 A086101 A131260 this_sequence A037355 A046300 
               A053738
%Y A047566 Adjacent sequences: A047563 A047564 A047565 this_sequence A047567 A047568 
               A047569
%K A047566 nonn
%O A047566 1,1
%A A047566 N. J. A. Sloane (njas(AT)research.att.com).