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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A089637 Smallest member of a pair of consecutive twin prime pairs that have exactly n primes between them. 0
17, 41, 107, 71, 2267, 1091, 461, 1319, 1151, 347, 5741, 2999, 5279, 10139, 1487, 9461, 881, 659, 13007, 9041, 15359, 8627, 28751, 13397, 18539, 14627, 26261, 24419 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..30.

PROG

(PARI) pbetweentw(n, p) = \p is the number of primes between { for(p=1, 100, forstep(x1=1, n, 1, c=0; t1 = twin[x1]; t2 = twin[x1+1]; for(y=t1+4, t2-1, if(isprime(y), c++) ); if(c==p, print1(t1", "); break) ) ) } savetwins(n) = Build a twin prime table of lower bounds { twin = vector(n); c=1; forprime(x=3, n*10, if(isprime(x+2), twin[c]=x; c++; ) ) }

CROSSREFS

Sequence in context: A155072 A243451 A145991 * A139961 A188661 A205171

Adjacent sequences:  A089634 A089635 A089636 * A089638 A089639 A089640

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Jan 01 2004

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 January 20 17:37 EST 2018. Contains 297961 sequences.