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Search: id:A061248
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| A061248 |
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Primes at which sum of digits strictly increases. |
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+0
3
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| 2, 3, 5, 7, 17, 19, 29, 59, 79, 89, 199, 389, 499, 599, 997, 1889, 1999, 2999, 4999, 6899, 8999, 29989, 39989, 49999, 59999, 79999, 98999, 199999, 389999, 598999, 599999, 799999, 989999, 2998999, 2999999, 4999999, 6999899, 8989999, 9899999
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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a(6) = 19, sum of digits is 10; a(7) = 29, sum of digits is 11 and 11 > 10.
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MAPLE
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P:=proc(n) local a, i, k, w; a:=2; print(a); for i from 2 by 1 to n do w:=0; k:=ithprime(i); while k>0 do w:=w+k-(trunc(k/10)*10); k:=trunc(k/10); od; if w>a then print(ithprime(i)); a:=w; fi; od; end: P(5000); [From Paolo P. Lava (ppl(AT)spl.at), Feb 25 2009]
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CROSSREFS
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For the actual digit sums see A062132.
Sequence in context: A069802 A067954 A158082 this_sequence A059498 A158085 A119833
Adjacent sequences: A061245 A061246 A061247 this_sequence A061249 A061250 A061251
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 23 2001
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EXTENSIONS
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More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 05 2001.
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