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%I #8 Aug 22 2015 14:29:57
%S 1,2,7,33,178,1162,7669,55548,419174,3274570,26298112
%N Number of lucky twins <= 10^n.
%H W. Schneider, <a href="http://web.archive.org/web/2004/www.wschnei.de/number-theory/lucky-numbers.html">Lucky Numbers</a>
%Y Cf. A000959.
%K nonn
%O 0,2
%A _Robert G. Wilson v_, Jun 09 2000
%E a(7),a(8),a(9) were calculated by Walter Schneider (wschnei(AT)t-online.de).
%E a(10) from _Robert G. Wilson v_, Aug 22 2015.
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