|
Search: id:A089634
|
|
|
| A089634 |
|
Smallest member of a pair of consecutive twin prime pairs that have two primes between them. |
|
+0
1
|
|
| 41, 197, 281, 599, 641, 827, 857, 1061, 1451, 2237, 2549, 3119, 3329, 3821, 4001, 4091, 5417, 5441, 5849, 6269, 6659, 6791, 7457, 7949, 8387, 8597, 9239, 9677, 10301, 10427, 10859, 10889, 11117, 11717, 11939, 12071, 13337, 13721, 13931
(list; graph; listen)
|
|
|
OFFSET
|
3,1
|
|
|
PROGRAM
|
(PARI) pbetweentw(n, p) = \p is the number of primes between { 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", ")) ) } 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: A141922 A142080 A141939 this_sequence A142526 A088319 A142392
Adjacent sequences: A089631 A089632 A089633 this_sequence A089635 A089636 A089637
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Cino Hilliard (hillcino368(AT)gmail.com), Jan 01 2004
|
|
|
Search completed in 0.002 seconds
|
