A046026 Smallest prime p dividing n#-1, n#, or n#+1, n squarefree.

2, 2, 2, 3, 3, 3, 5, 7, 13, 7, 5, 17, 7, 7, 11, 23, 13, 5, 5, 5, 11, 17, 7, 23, 19, 13, 41, 7, 43, 23, 47, 17, 19, 11, 19, 29, 13, 17, 31, 13, 11, 67, 23, 7, 71, 53, 37, 11, 13, 29, 41, 83, 17, 43, 29, 89, 13, 31, 47, 19, 17, 101, 17, 103, 7, 53, 107, 109, 11, 37, 113, 19

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn

References

• C. Ashbacher, A Note on the Smarandache Near-To-Primorial Function, Smarandache Notions J. 7 (1996), 46-49.
• M. R. Mudge, The Smarandache Near-To-Primorial Function, Abstracts of Papers Presented to the Amer. Math. Soc., 17 (1996), 585

Links

• Eric Weisstein's World of Mathematics, Smarandache Near-to-Primorial Function

Crossrefs

Cf. A002110 (primorial numbers), A046027, A013929.

Formula

Smallest prime p such that n divides one of p#-1, p#, p#+1