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%I #15 Jan 04 2017 07:02:03
%S 2,6,14,18,26,30,36,48,92,112,114,122,150,168,190,348,372,384,458,474,
%T 498,642,738,1028,1244,1380,1500,1766,1784,1800,1852,1998,2200,2280,
%U 2628,2992,3000
%N Record gaps between prime-indexed primes.
%e a(4) = 18 because the next prime-indexed prime after 41 is 59, and that is a record gap of size 18.
%t Union@ Rest@ FoldList[Max, 0, Differences@ Array[Prime@ Prime@ # &, 10^6]] (* _Michael De Vlieger_, Dec 25 2016 *)
%Y Cf. A006450, A280080, A280081.
%K nonn
%O 1,1
%A _Bobby Jacobs_, Dec 25 2016