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A073475 Rearrangement of factorial numbers such that a(k) + a(k+1) - 1 is a prime for all k. +0
1
1, 2, 6, 24, 720, 120 (list; graph; listen)
OFFSET

1,2

COMMENT

The sequence is full because the next term would be divisible by 7 (the other factorials are already used), but 120+7x-1 is divisible by 7, and so cannot be a prime. - Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Feb 01 2003

CROSSREFS

Cf. A000142.

Sequence in context: A052692 A052723 A114778 this_sequence A061774 A088258 A089718

Adjacent sequences: A073472 A073473 A073474 this_sequence A073476 A073477 A073478

KEYWORD

fini,full,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Aug 26 2002

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.


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