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A097944
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Number of digits in n-th prime.
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4
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1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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COMMENTS
| For primes p <= n sum(a(n)) -> n/2 and n-> inf.
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FORMULA
| a(n) ~ (log n + log log n)/(log 10) + O(1).
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EXAMPLE
| The first 4 primes are 2,3,5,7. These are 1 digit numbers so the first 4 entries in the table are 1's.
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MATHEMATICA
| a[n_]:=StringLength[ToString[Prime[n]]]; [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 03 2008]
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PROG
| (PARI) a(n)=#Str(prime(n))
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CROSSREFS
| Sequence in context: A077429 A204553 A060417 * A037203 A032556 A110592
Adjacent sequences: A097941 A097942 A097943 * A097945 A097946 A097947
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KEYWORD
| nonn,base
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Sep 05 2004
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