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Search: id:A078502
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| A078502 |
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a(n) = smallest positive integer N such that (N - k)/k is prime for k = 1, 2, ..., n. |
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+0
2
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| 3, 6, 12, 12, 174600, 7224840, 10780560, 10780560, 1086338816640, 50060257410240, 7720634052774720, 227457297898150320, 7272877497848202240, 7272877497848202240
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Idea for the sequence and first eleven terms are from Ken Wilke.
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LINKS
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C. Rivera, Puzzle 206. (N-k)/k Primes in www.primepuzzles.net
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EXAMPLE
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(12-k)/k is prime for k = 1,2,3,4, and 12 is the smallest positive integer satisfying this property. Hence a(4) = 12.
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CROSSREFS
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Adjacent sequences: A078499 A078500 A078501 this_sequence A078503 A078504 A078505
Sequence in context: A081513 A038587 A090553 this_sequence A107974 A116625 A062053
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KEYWORD
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nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Jan 05 2003
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EXTENSIONS
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Corrected and extended by Jens Kruse Andersen (jens.k.a(AT)get2net.dk), Jan 10 2003
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