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Search: id:A117478
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| 32, 56, 175, 182, 212, 218, 227, 331, 362, 377, 386, 397, 409, 481, 508, 571, 595, 599, 728, 751, 755, 779, 821, 827, 847, 869, 878, 896, 902, 922, 940, 953, 982, 1099, 1129, 1354, 1372, 1408, 1417, 1468, 1475, 1507, 1550, 1585, 1648, 1693, 1747, 1772, 1774
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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A subset of A033548-A022549 but here the SODs must be prime and equal
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FORMULA
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Find prime indices with associated primes where both SODs are the same and prime.
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EXAMPLE
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a(3) = 182, with SOD 11. The associated prime is 1091, also SOD 11. SODs must be prime and equal.
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PROGRAM
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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
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CROSSREFS
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Cf. A117477, A033548-A033549, A117458-A117463.
Sequence in context: A118617 A033907 A033549 this_sequence A124353 A008434 A130447
Adjacent sequences: A117475 A117476 A117477 this_sequence A117479 A117480 A117481
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KEYWORD
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easy,nonn,base
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Mar 19 2006
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