id:A151893 - OEIS Search Results

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a(n) = smallest number k such that n! + k-th prime after n! is prime.

+0
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; listen)

	OFFSET	`1,5`
	MATHEMATICA	`a = {}; Do[k = 1; While[ ! PrimeQ[n! + NextPrime[n!, k]], k++ ]; Print[k]; AppendTo[a, k], {n, 1, 200}]; a (Artur Jasinski)`
	CROSSREFS	`Cf. A002981, A151892, A151894, A151903, A139213, A139214.` `Sequence in context: A024735 A024957 A153914 this_sequence A000361 A135723 A125311` `Adjacent sequences: A151890 A151891 A151892 this_sequence A151894 A151895 A151896`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Apr 12 2008`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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