%I A075683
%S A075683 2,17,20,22,25,28,31,34,37,40
%N A075683 2nd differences of A075681.
%H A075683 Ed Pegg Jr., <a href="http://www.mathpuzzle.com/pancakes.htm">Pancakes</
               a>
%e A075683 a[4]=39, a[5]=61 from the original sequence, hence a[4]=22
%Y A075683 Sequence in context: A040138 A107139 A042055 this_sequence A157191 A006029 
               A126961
%Y A075683 Adjacent sequences: A075680 A075681 A075682 this_sequence A075684 A075685 
               A075686
%K A075683 nonn
%O A075683 1,1
%A A075683 Jon Perry (perry(AT)globalnet.co.uk), Oct 12 2002