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Search: id:A088755
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| A088755 |
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Number of n-digit primes beginning with n. |
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+0
6
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| 0, 2, 16, 119, 924, 7445, 63129, 547572, 4838319, 43336106, 392654167, 3590161711, 33075934249
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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This is a subsidiary sequence suggested in A088104.
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EXAMPLE
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a(2)=2 since 23 and 29 are the only two 2-digit primes beginning with 2.
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MATHEMATICA
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Table[PrimePi[(i + 1)*10^(i - 1)] - PrimePi[i*10^(i - 1)], {i, 2, 13}] (from Harvey Dale)
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CROSSREFS
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Cf. A077504, A077505, A088104, A088105, A088754.
Sequence in context: A125725 A162723 A159324 this_sequence A136782 A112710 A046105
Adjacent sequences: A088752 A088753 A088754 this_sequence A088756 A088757 A088758
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KEYWORD
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nonn,base
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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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More terms from Harvey P. Dale (hpd1(AT)nyu.edu), Oct 16 2003
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