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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A087715 Table read by rows where i-th row consists of primes P of the form P=j*P(i)# -1 or P=j*P(i)# +1 with 0 < j < P(i+1). Here P(r)# = A002110. 4
3, 3, 5, 5, 7, 11, 13, 17, 19, 23, 29, 31, 59, 61, 89, 149, 151, 179, 181, 211, 419, 421, 631, 839, 1049, 1051, 1259, 1471, 1889, 2099, 2309, 2311, 4621, 9239, 9241, 11549, 11551, 13859, 18481, 20789, 23099, 25409, 25411, 30029, 90089, 120121, 150151 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..46.

EXAMPLE

Table begins:

3,3,5,

5,7,11,13,17,19,23,

29,31,59,61,89,149,151,179,181,

211,419,421,631,839,1049,1051,1259,1471,1889,2099,

2309,2311,4621,9239,9241,11549,11551,13859,18481,20789,23099,25409,25411

PROG

(PARI) {for(i=1, 6, p=prod(j=1, i, prime(j)); for(j=1, prime(i+1)-1, c=j*p; if(isprime(c-1), print1(c-1 ", ")); if(isprime(c+1), print1(c+1 ", ")); ); ); }

CROSSREFS

Cf. A087714, A087716, A087728.

Sequence in context: A212597 A268188 A231608 * A237714 A245145 A092316

Adjacent sequences:  A087712 A087713 A087714 * A087716 A087717 A087718

KEYWORD

tabf,nonn

AUTHOR

Pierre CAMI, Sep 29 2003

EXTENSIONS

Edited by Ray Chandler, Sep 30 2003

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 26 01:08 EDT 2019. Contains 321479 sequences. (Running on oeis4.)