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A274825
Gaps associated with the arithmetic progressions in A278735.
3
0, 2, 6, 78, 8640, 1155000, 82419540
OFFSET
1,2
COMMENTS
The first set of 4 prime-indexed primes in arithmetic progression (353, 431, 509, and 587) contains consecutive terms of A142160.
EXAMPLE
a(4) = 78 because 353 = prime(prime(20)), 431 = prime(prime(23)), 509 = prime(prime(25)), 587 = prime(prime(28)), and 431-353 = 509-431 = 587-509 = 78.
For the corresponding arithmetic progressions, see Charles R Greathouse IV's example in A278735. - Bobby Jacobs, Jan 02 2017
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Bobby Jacobs, Dec 08 2016
EXTENSIONS
a(7) from Bobby Jacobs, Jan 02 2017
STATUS
approved