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Search: id:A088754
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| A088754 |
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Number of n-digit primes beginning with prime(n). |
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+0
6
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| 1, 2, 14, 107, 103, 851, 6931, 59557, 518971, 4585526
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Subsidiary sequence suggested in A088104.
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EXAMPLE
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a(2)=2 since 31 and 37 are the only two 2-digit primes beginning with prime(2)=3.
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PROGRAM
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(PARI) A088754(n)={ local (resul, sdig, p, lo, hi) ; sdig=prime(n) ; lo=sdig ; hi=sdig+1 ; while( lo < 10^(n-1), lo *= 10 ; hi *= 10 ; ) ; resul=0 ; p=nextprime(lo) ; while(p < hi, resul++ ; p=nextprime(p+1) ; ) ; return(resul) ; } { for(n=1, 11, print(A088754(n)); ) } - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 25 2006
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CROSSREFS
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Cf. A077504, A077505, A088104, A088105, A088755.
Sequence in context: A051708 A074618 A108436 this_sequence A103945 A111713 A092639
Adjacent sequences: A088751 A088752 A088753 this_sequence A088755 A088756 A088757
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KEYWORD
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more,nonn
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AUTHOR
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Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 15 2003
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EXTENSIONS
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One more term from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 25 2006
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