Search: id:A117478
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%I A117478
%S A117478 32,56,175,182,212,218,227,331,362,377,386,397,409,481,508,571,595,599,
%T A117478 728,751,755,779,821,827,847,869,878,896,902,922,940,953,982,1099,1129,
%U A117478 1354,1372,1408,1417,1468,1475,1507,1550,1585,1648,1693,1747,1772,1774
%N A117478 Indices of associated primes in A117477.
%C A117478 A subset of A033548-A033549 but here the SODs must be prime and equal
%F A117478 Find prime indices with associated primes where both SODs are the same 
               and prime.
%e A117478 a(3) = 182, with SOD 11. The associated prime is 1091, also SOD 11. SODs 
               must be prime and equal.
%o A117478 UBASIC 20 'SOD prime index and SOD prime 30 Y=1 40 Y=nxtprm(Y) 50 C=C+1:print 
               C;Y;"-"; 60 D=str(C):Z=str(Y) 70 E=len(D):F=len(Z) 80 for Q=2 to 
               E 90 A=mid(D,Q,1):G=val(A) 100 I=I+G:print I; 110 next Q 120 for 
               R=2 to F 130 B=mid(Z,R,1):H=val(B) 140 J=J+H:print J; 150 next R 
               160 if I=prmdiv(I) and J=prmdiv(J) and I=J then stop 170 I=0:J=0 
               180 goto 40
%Y A117478 Cf. A117477, A033548-A033549, A117458-A117463.
%K A117478 easy,nonn,base,new
%O A117478 0,1
%A A117478 Enoch Haga (Enokh(AT)comcast.net), Mar 19 2006
%E A117478 Typo in comment fixed by Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), 
               Dec 03 2009

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