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A225517 Integers n > 1 such that expression n!/(prime(n-1)+1) is not an integer. 1
2, 3, 13, 19, 22, 38, 39, 45, 48, 60, 62, 66, 68, 79, 83, 89, 100, 101, 102, 113, 122, 123, 126, 131, 135, 139, 152, 156, 169, 178, 184, 189, 192, 194, 195, 197, 198, 199, 204, 217, 219, 221, 222, 228, 232, 243, 256, 258, 261, 266, 270, 274, 286, 288, 289, 292 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1100

MATHEMATICA

Select[Range[2, 522], ! IntegerQ[#!/(Prime[# - 1] + 1)] &] (* T. D. Noe, May 10 2013 *)

PROG

(PARI) m=M=1; forprime(p=2, 1e5, M*=m++; t=denominator(M/(p+1)); if(t>1, print1(m", ")))

CROSSREFS

Cf. A223881.

Sequence in context: A215386 A338216 A143871 * A254462 A275030 A194598

Adjacent sequences:  A225514 A225515 A225516 * A225518 A225519 A225520

KEYWORD

nonn

AUTHOR

Alexander R. Povolotsky, May 09 2013

STATUS

approved

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Last modified June 23 17:39 EDT 2021. Contains 345402 sequences. (Running on oeis4.)