OFFSET
1,1
COMMENTS
A cousin prime pair is a pair of primes that differ by 4.
a(8) was found by the T. Brada Experimental Grid BOINC project.
LINKS
N. Makarova and C. Rivera, Puzzle 841. Symmetrical compositions of consecutive pairs of cousin primes, The Prime Puzzles and Problems Connection.
EXAMPLE
a(2) = 7 since the 4 consecutive primes (7, 11, 13, 17) are two pairs of cousin primes which are symmetrical because 7 + 17 = 11 + 13.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Natalia Makarova, Mar 30 2022
STATUS
approved