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A063833 !n - 3 is prime. 1
1, 4, 5, 6, 13, 14, 20, 66, 91, 124, 212, 282, 460 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

There are no further terms, because for n >= 467, 467 | !n - 3. - Serge Batalov, Jul 14 2017

LINKS

Table of n, a(n) for n=1..13.

MATHEMATICA

Do[ If[ PrimeQ[ Sum[ k!, {k, 0, n - 1} ] - 3 ], Print[ n ] ], {n, 1, 800} ]

Position[Accumulate[Range[0, 500]!], _?(PrimeQ[#-3]&)]//Flatten (* Harvey P. Dale, Sep 20 2019 *)

CROSSREFS

Cf. A063508.

Sequence in context: A280382 A055033 A089119 * A260107 A167434 A139061

Adjacent sequences:  A063830 A063831 A063832 * A063834 A063835 A063836

KEYWORD

nonn,fini,full

AUTHOR

Robert G. Wilson v, Aug 21 2001

STATUS

approved

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Last modified January 17 12:18 EST 2020. Contains 330958 sequences. (Running on oeis4.)