OFFSET
1,1
EXAMPLE
67 is in the sequence because 67 + 4 = 71 and 67 + 4 + 2 = 73 are primes, the prime prior to 67 is 61, the prime after 73 is 79, and the corresponding differences are 6 and 6. The d-pattern "around 67" is {6,4,2,6}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jan 26 2000
STATUS
approved