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Search: id:A103963
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| A103963 |
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Incremental subsequence of A040081 such that every a(n)>a(n-1). |
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2
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OFFSET
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1,1
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COMMENT
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A040081(659) not yet found. The index sequence of this one is 1, 13, 23, 43, 59, 88, 127, 148, 659.
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EXAMPLE
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A040081(1)=2; A040081(13)=3; A040081(659)>8192
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MATHEMATICA
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kmax=8192; k = 0; n = 0; km = k; While[k < kmax, n++; k = 0; cp = n*(2^k) - 1; While[(!PrimeQ[cp]) && (k < kmax), k++; cp = n*(2^k) - 1]; If[k > km, km = k; Print[{n, km}]]]
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CROSSREFS
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Cf. A040081.
Sequence in context: A084972 A141002 A006537 this_sequence A006706 A124390 A107031
Adjacent sequences: A103960 A103961 A103962 this_sequence A103964 A103965 A103966
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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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