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%I #6 Jan 24 2022 08:02:33
%S 104,410,1004,1014,1040,1041,1044,1104,1410,4010,4100,4101,4104,4110,
%T 4410,10004,10014,10040,10041,10044,10104,10114,10140,10141,10144,
%U 10145,10400,10401,10404,10410,10411,10414,10440,10441,10444,10514,11004,11014,11040
%N Numbers k such that for any single digit d of k the d-th semiprime sp(k) is substring of k.
%C sp(1..9)=4,6,9,10,14,15,21,22,25, with the convention that sp(0)=1.
%H David Applegate, <a href="/A135441/b135441.txt">Table of n, a(n) for n = 1..300</a>
%Y Cf. A134439, A134962, A135463.
%K nonn,base
%O 1,1
%A _Zak Seidov_, Feb 17 2008
%E Corrected and extended by _David Applegate_, Feb 18 2008
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