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A114780(n)/(2n-1).
1

%I #7 Dec 05 2013 19:57:14

%S 2,1,1,1,79,83,9,0,19,91,11,19,0,9,43,63,23,0,91,89,53,53,0,87,53,551,

%T 851,0,37,307,707,637,0,17,321,481,509,0,171,787,459,207,0,439,373,

%U 189,927,0,291,871,933,313,0,993,773,633,613,0,481,599,523,791,0,593,297

%N A114780(n)/(2n-1).

%o (PARI) a(n) = {if (((n >=8) && ((n-8) % 5 == 0)), return (0)); k = 1; tn = 2*n-1; p = prime(n); tp = 10^length(Str(p)); while ((k*tn) % tp != p, k++); return (k);} \\ _Michel Marcus_, Sep 15 2013

%Y Cf. A114780.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Nov 17 2005

%E More terms from _Joshua Zucker_, May 05 2006