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%I #83 Jan 07 2017 06:42:18
%S 0,2,6,78,8640,1155000,82419540
%N Gaps associated with the arithmetic progressions in A278735.
%C The first set of 4 prime-indexed primes in arithmetic progression (353, 431, 509, and 587) contains consecutive terms of A142160.
%e 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.
%e For the corresponding arithmetic progressions, see _Charles R Greathouse IV_'s example in A278735. - _Bobby Jacobs_, Jan 02 2017
%Y Cf. A006450, A093364, A142160, A278735, A279021, A279062.
%K nonn,hard,more
%O 1,2
%A _Bobby Jacobs_, Dec 08 2016
%E a(7) from _Bobby Jacobs_, Jan 02 2017