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Search: id:A088120
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| A088120 |
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Smallest prime obtained as a product of n terms of an arithmetic progression + the common difference. |
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+0
2
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| 2, 3, 7, 107, 947, 20161, 604801, 6652801, 726485761, 39916801, 39916801, 316234143227, 14820309504001, 10461394944001, 641171050071552001, 425757851430912001, 9366672731480064001, 8515157028618240001
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Conjectures: (1) Sequence is infinite. (2) The common difference arising = 1 except for n = 4 and 5 in which case it is 2.
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EXAMPLE
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a(4) = 1*3*5*7 + 2 = 107. a(5) = 1*3*5*7*9 + 2,
a(6) = 5*6*7*8*9*10 + 1 = 151201.
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CROSSREFS
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Cf. A088121.
Sequence in context: A062578 A062529 A058443 this_sequence A111870 A062935 A083436
Adjacent sequences: A088117 A088118 A088119 this_sequence A088121 A088122 A088123
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KEYWORD
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easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 25 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jul 25 2005
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