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Search: id:A086362
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| 5, 17, 239, 41, 131, 1889, 419, 89, 101, 113, 2543, 2789, 149, 881, 173, 9293, 491, 14249, 3191, 1973, 3539, 21377, 7103, 281, 5987, 38153, 317, 2789, 6971, 353, 214943, 42677, 3299, 11801, 2267, 27773, 29867, 10529, 461, 1181, 2663, 129209
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OFFSET
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0,1
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COMMENT
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A086361 and A086362 includes most probably the solvable [or small?] cases of A085956, where n=3k-1 has probably only two solutions, at [k,n,a(n)]=[1,2,13] and at [2,5,31].
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EXAMPLE
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n=50:3n+1=151,6n+2=302, a(50)=93923 prime with (93922-1)/302=311, prime and with 302.93923+1=28364747 prime; so the {311,93923,28364747} "generalized [short] Cunningham-chain" is defined.
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CROSSREFS
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Cf. A085956, A086361.
Sequence in context: A096407 A062230 A103920 this_sequence A089894 A077718 A093428
Adjacent sequences: A086359 A086360 A086361 this_sequence A086363 A086364 A086365
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jul 22 2003
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