Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A087716
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A087716 Base 2 pseudoprimes (see A001567) of the form j*p(i)#-p(k) or j*p(i)#+p(k), p(i) and p(k) primes with p(i) < p(k) < p(i+1)^2 and 0 < j < p(i+1). +0
4
341, 1387, 2047, 4681, 13747 (list; graph; listen)
OFFSET

1,1

COMMENT

Conjecture: sequence has only 5 terms. This has been checked for all i <= 150.

EXAMPLE

2*7# - 79 = 341

7*7# - 83 = 1387

10*7# - 53 = 2047

2*11# + 61 = 4681

6*11# - 113 = 13747

CROSSREFS

Cf. A001567, A087714, A087715, A087728.

# denotes primorials; see A002110.

Sequence in context: A050217 A086837 A020230 this_sequence A084653 A143688 A086250

Adjacent sequences: A087713 A087714 A087715 this_sequence A087717 A087718 A087719

KEYWORD

nonn

AUTHOR

Pierre CAMI (colettecami(AT)aol.com), Sep 29 2003

EXTENSIONS

Edited by David Wasserman (dwasserm(AT)earthlink.net), Apr 13 2006

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


AT&T Labs Research