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Search: id:A065537
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| A065537 |
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a(n) is smallest prime > 10*a(n-1), a(1) = 7. |
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+0
1
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| 7, 71, 719, 7193, 71933, 719333, 7193357, 71933597, 719335993, 7193359933, 71933599363, 719335993631, 7193359936331, 71933599363319, 719335993633291, 7193359936332919, 71933599363329217, 719335993633292261
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,100
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MATHEMATICA
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NextPrim[n_Integer] := Block[ {k = n + 1}, While[ !PrimeQ[k], k++ ]; Return[k]]; a[1] = 7; a[n_] := NextPrim[ 10*a[n - 1]]; Table[ a[n], {n, 1, 20} ]
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PROGRAM
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(PARI) { for (n=1, 100, if (n>1, a=nextprime(10*a), a=7); write("b065537.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 21 2009]
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CROSSREFS
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Cf. A065122.
Sequence in context: A069591 A039920 A100895 this_sequence A048552 A067307 A052390
Adjacent sequences: A065534 A065535 A065536 this_sequence A065538 A065539 A065540
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 28 2001
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