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Search: id:A137269
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| A137269 |
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Number of primes with maximal digit product for a digit sum of n. |
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+0
1
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| 0, 1, 1, 2, 1, 0, 2, 1, 0, 1, 2, 0, 5, 1, 0, 4, 3, 0, 8, 2, 0, 2, 2, 0, 4, 1, 0, 1
(list; graph; listen)
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OFFSET
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1,4
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EXAMPLE
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a(19)=8 and a(20)=2 because we respectively have the 8 primes 333433, 334333, 343333, 2332333, 2333323, 3223333, 3233323, 3332233 all with a maximal digit product of 3^5*2^2 = 972 for a digit sum of 19, and the 2 primes 3233333, 3333233 with maximal digit product 3^6*2 = 1458 for digit sum 20.
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CROSSREFS
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Cf. A137248, A136150, A138975, A133223, A000792.
Sequence in context: A138514 A030200 A095734 this_sequence A112201 A112203 A132798
Adjacent sequences: A137266 A137267 A137268 this_sequence A137270 A137271 A137272
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KEYWORD
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more,nonn,base
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Apr 05 2008
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