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Least k such that A056830(n) + k is semiprime, where A056830 = alternate digits 1 and 0.
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%I #7 Dec 15 2017 17:36:32

%S 3,0,5,1,1,1,1,1,5,3,2,5,6,21,2,9,2,8,4,1,5,9,34,23,4,12,5,8,17,9,10,

%T 1,12,11,10,3,0,37,26,3,20,29,16,21,38,41,18,11,6,21,8,7,2,31,30,12,

%U 38,69,2,27

%N Least k such that A056830(n) + k is semiprime, where A056830 = alternate digits 1 and 0.

%K nonn,base

%O 1,1

%A _Jason Earls_, Jul 28 2003