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A078883 Lesser member p of a twin prime pair such that p+1 is 3-smooth. 2
3, 5, 11, 17, 71, 107, 191, 431, 1151, 2591, 139967, 472391, 786431, 995327, 57395627, 63700991, 169869311, 4076863487, 10871635967, 2348273369087, 56358560858111, 79164837199871, 84537841287167, 150289495621631 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A027856(n)-1 = A078884(n)-2.

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

A000040(20)=71 and 71+1=72=2^3*3^2=A003586(17) and 71+2=73=A000040(21), therefore 71 is a term.

CROSSREFS

Cf. A001359, A014574, A003586.

Apart from initial terms, same as A059960.

Sequence in context: A216181 A101781 A101783 * A155990 A109556 A167675

Adjacent sequences:  A078880 A078881 A078882 * A078884 A078885 A078886

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Dec 11 2002

STATUS

approved

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Last modified November 23 00:51 EST 2014. Contains 249836 sequences.