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A151893 a(n) = smallest number k such that n! + k-th prime after n! is prime. 4
1, 1, 1, 1, 2, 1, 1, 2, 4, 10, 2, 4, 3, 1, 1, 4, 2, 9, 14, 1, 6, 14, 6, 5, 1, 11, 3, 35, 14, 20, 4, 1, 10, 1, 1, 6, 37, 33, 25, 17, 62, 2, 5, 26, 12, 10, 11, 37, 9, 9, 4, 50, 32, 9, 9, 7, 9, 47, 10, 40, 80, 60, 3, 18, 6, 2, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..300

MATHEMATICA

a = {}; Do[k = 1; While[ ! PrimeQ[n! + NextPrime[n!, k]], k++ ]; Print[k]; AppendTo[a, k], {n, 1, 200}]; a

CROSSREFS

Cf. A002981, A151892, A151894, A151903, A139213, A139214.

Sequence in context: A024735 A024957 A153914 * A326566 A213953 A000361

Adjacent sequences:  A151890 A151891 A151892 * A151894 A151895 A151896

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 12 2008

STATUS

approved

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Last modified June 4 17:50 EDT 2020. Contains 334828 sequences. (Running on oeis4.)