login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 9 12:18 EST 2016. Contains 278971 sequences.