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Search: a063106 -id:a063106
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A063508
Numbers n such that !n + 2n - 1 is prime.
+10
2
1, 2, 4, 5, 7, 13, 40, 124, 758, 940
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
MATHEMATICA
Do[ If[ PrimeQ[ Sum[ k!, {k, 0, n - 1} ] + 2n - 1 ], Print[ n ] ], {n, 1, 883} ]
CROSSREFS
Cf. A063106.
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Aug 09 2001
STATUS
approved
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Last modified November 17 03:22 EST 2024. Contains 377807 sequences.
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