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Beginning of last prime pattern of length n to appear among positive integers.
1

%I #8 Mar 30 2012 18:35:33

%S 4,8,9,24,25,90,91,114,143,143,205,205,1601,1601,2327,2327,5467,5467,

%T 18043,18043,29381,29381,90001,90001,3153569,3153569,3153569,3153569,

%U 4647259,4647259,74266243,74266243

%N Beginning of last prime pattern of length n to appear among positive integers.

%e a(7) = 91 since 91 starts the length-7 prime pattern "ccccccp" (six composites followed by one prime) and all other possible length-7 prime patterns start with a number smaller than 91.

%Y Cf. A023192.

%K nonn

%O 1,1

%A _David W. Wilson_