%I A002116 M2125 N0842
%S A002116 2,20,402,14440,825502,69055260,7960285802,1209873973712
%N A002116 Some special numbers.
%D A002116 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A002116 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A002116 A. Fletcher, J. C. P. Miller, L. Rosenhead and L. J. Comrie, An Index 
               of Mathematical Tables. Vols. 1 and 2, 2nd ed., Blackwell, Oxford 
               and Addison-Wesley, Reading, MA, 1962, Vol. 1, p. 77.
%Y A002116 Sequence in context: A078698 A090728 A090309 this_sequence A058346 A165554 
               A009746
%Y A002116 Adjacent sequences: A002113 A002114 A002115 this_sequence A002117 A002118 
               A002119
%K A002116 nonn
%O A002116 0,1
%A A002116 N. J. A. Sloane (njas(AT)research.att.com).