A224536 - OEIS

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A224536

Number of ways a digit can be appended or prepended to n and form a unique prime.

%I #5 Apr 22 2013 00:12:06

%S 4,8,2,8,3,2,2,8,2,6,4,5,1,6,1,2,2,4,1,8,0,4,3,5,1,2,2,6,2,4,1,7,0,5,

%T 2,2,1,5,2,6,2,5,1,6,2,1,3,5,1,5,2,3,2,4,2,1,2,8,1,5,2,6,0,6,3,2,1,6,

%U 1,4,2,4,1,6,1,2,2,6,1,4,1,4,4,6,0,3,1

%N Number of ways a digit can be appended or prepended to n and form a unique prime.

%C See A224953 for the main entry. The only difference is a(1) = 8, when two copies of 11 are produced.

%K nonn,base

%O 0,1

%A _T. D. Noe_, Apr 21 2013