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Search: id:A103964
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| A103964 |
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Incremental subsequence of A040076 such that every a(n)>a(n-1). |
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+0
2
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OFFSET
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1,3
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COMMENT
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The index sequence of this sequence is 1, 3, 7, 17, 19, 31, 47, 383, 2897. A040076(2897)>8192, not yet found.
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EXAMPLE
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A040076(1)=0, so a(1)=0;
A040076(3)=1, so a(2)=1;
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MATHEMATICA
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k = -1; n = 0; km = k; While[k < 8192, n++; k = 0; cp = n*(2^ k) + 1; While[(! PrimeQ[cp]) && (k < 8192), k++; cp = n*(2^k) + 1]; If[k > km, km = k; Print[{n, km}]]]
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CROSSREFS
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Cf. A040076, A103963.
Sequence in context: A051934 A153915 A093705 this_sequence A088329 A087494 A021426
Adjacent sequences: A103961 A103962 A103963 this_sequence A103965 A103966 A103967
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KEYWORD
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nonn
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AUTHOR
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Lei Zhou (lzhou5(AT)emory.edu), Feb 24 2005
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