OFFSET
1,1
COMMENTS
q > p are "twin simili-primes of order 2" if (p, q) are in A123929 and satisfy q - p = 3. Conjecture : this sequence is infinite.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Feb 11 2007
EXTENSIONS
More terms from Amiram Eldar, Dec 20 2019
STATUS
approved