%I A055550
%S A055550 0,0,3,22,78,245,750,2057,5597,14884,38975,101629,264239
%N A055550 Number of Poulet numbers (or pseudoprimes to base 2, A001567) less than 
               10^n.
%D A055550 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 245, pp 68, Ellipses, 
               Paris 2008. - Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 20 2008
%D A055550 W. F. Galway, "The pseudoprimes below to 2^64", http://oldweb.cecm.sfu.ca/
               pseudoprime/psp-search-slides.pdf.
%D A055550 W. F. Galway, Database of pseudoprimes up to 10^15, http://oldweb.cecm.sfu.ca/
               pseudoprime/.
%H A055550 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PouletNumber.html">Link to a section of The World of Mathematics.</
               a>
%H A055550 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Pseudoprime.html">Link to a section of The World of Mathematics.</
               a>
%Y A055550 Cf. A001567, A055552.
%Y A055550 Sequence in context: A006532 A005288 A143166 this_sequence A075204 A106150 
               A135836
%Y A055550 Adjacent sequences: A055547 A055548 A055549 this_sequence A055551 A055552 
               A055553
%K A055550 nonn,more
%O A055550 1,3
%A A055550 Eric Weisstein (eric(AT)weisstein.com)
%E A055550 a(14) and a(15) computed by William F. Galway and communicated by Arthur 
               Livingstone (arthur.livingstone(AT)gmail.com), Apr 10 2007
%E A055550 Edited by N. J. A. Sloane (njas(AT)research.att.com), Feb 01 2009 at 
               the suggestion of Charles Greathouse