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Search: id:A089307
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| A089307 |
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Smallest prime of the form 1+n*(n+n_2)*...*(n+n_n) with 1<=n_2<n_3<...<n_n. A089308 gives terms of products. |
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2
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| 2, 7, 61, 1201, 15121, 332641, 9313921, 319334401, 10897286401, 419026608001, 14079294028801, 647647525324801, 34972966367539201, 2017671136588800001, 108416195739371520001, 6707348643075784704001, 440955772120958814720001
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OFFSET
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1,1
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EXAMPLE
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a(4)=1201 because 1201 is the smallest prime that can be written as 1 + product of 4 strictly increasing terms and smallest term 4: 1201=1+4*5*6*10.
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CROSSREFS
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Cf. A089308.
Sequence in context: A065397 A046846 A111010 this_sequence A102896 A088107 A132524
Adjacent sequences: A089304 A089305 A089306 this_sequence A089308 A089309 A089310
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 01 2003
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EXTENSIONS
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More terms from Hugo Pfoertner (hugo(AT)pfoertner.org), Apr 06 2004
Further terms from David Wasserman (wasserma(AT)spawar.navy.mil), Sep 09 2005
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