%I A100757
%S A100757 11,131,3,7,101,9066319,3,3,89,3,1721,13,8761,1213,7,3,
%T A100757 1056688498936034269,37,29,3,3,11,3,19457,7,19,11,307,3,521,7,11887,3,
               3,
%U A100757 7,3,13,11,103,43,22927346902711843,3,17,13,31,3,3,7,3,133811,37,11,13
%N A100757 Smallest prime factor of the concatenation of terms of the n-th row of 
               the Stirling's number of the second kind.
%C A100757 Sequences from other important triangles with unity as the first and 
               the last term can be contributed.
%C A100757 A061113(8) is the first member of A061113 that is not squarefree; it 
               is divisible by 3^3. - David Wasserman (dwasserm(AT)earthlink.net), 
               Mar 06 2008
%F A100757 a(n) = A020639[A061113(n)]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Aug 07 2007
%e A100757 a(4) = 3 is the least prime factor of 1761.
%Y A100757 Cf. A100755, A100756, A100758, A008277.
%Y A100757 Sequence in context: A015603 A157718 A046210 this_sequence A099677 A142187 
               A140004
%Y A100757 Adjacent sequences: A100754 A100755 A100756 this_sequence A100758 A100759 
               A100760
%K A100757 base,easy,nonn
%O A100757 2,1
%A A100757 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 23 2004
%E A100757 More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 07 2007
%E A100757 More terms from David Wasserman (dwasserm(AT)earthlink.net), Mar 06 2008