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A175516 a(n) = smallest positive even integer k such that k or one of its left substrings is divisible by any integer from {1..n}. 1

%I

%S 2,2,6,12,60,60,252,504,504,504,7260,7260,10296,11760,11760,11760,

%T 56160,56160,198016,198016,1176480,1323008,2992500,6240366,13442580,

%U 13442580,37536408,37536408,90725804,90725804,319800096,319800096,319800096,800640126,2201169600,2201169600,4656965040,5250966084,5250966084

%N a(n) = smallest positive even integer k such that k or one of its left substrings is divisible by any integer from {1..n}.

%H Hugo van der Sanden <a href="http://crypt.org/hv/puzzle/A169858-0.03.tar.bz2">A169858-0.03.tar.bz2</a>: C source code to calculate terms (has an option to compute the present sequence)

%Y Cf. A169858.

%K base,nonn

%O 1,1

%A _Zak Seidov_, Jun 03 2010

%E Corrected and extended by _Hugo van der Sanden_, Jun 01 2010

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Last modified May 13 08:08 EDT 2021. Contains 343836 sequences. (Running on oeis4.)