OFFSET
1,3
LINKS
EXAMPLE
a(12)=50408 because there are 50408 prime-sextuplets up to 10^12.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Martin Raab, Jul 30 2001
EXTENSIONS
2 more terms from Martin Raab, Oct 06 2005
a(17) from Norman Luhn, Nov 08 2021
STATUS
approved