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a(n) = n-th prime of Erdős-Selfridge classification n+.
2

%I #8 Jan 03 2013 12:39:31

%S 2,19,113,617,1877,8753,52517,255043,1532173,9287521,48499459,

%T 353653063,2136716521,18171787987,111795382441

%N a(n) = n-th prime of Erdős-Selfridge classification n+.

%C Diagonalization of the Erdős-Selfridge classification of primes n+. See A101231 for diagonalization of the Erdős-Selfridge classification of primes n-.

%D R. K. Guy, Unsolved Problems in Number Theory, A18.

%e a(1) = 2 because 2 is the first element of A005105.

%e a(2) = 19 because 19 is the 2nd element of A005106.

%e a(3) = 113 because 113 is the 3rd element of A005107.

%e a(4) = 617 because 617 is the 4th element of A005108.

%e a(5) = 1877 because 1877 is the 5th element of A081633.

%e a(6) = 8753 because 8753 is the 6th element of A081634.

%Y Cf. A101231, A005105, A005106, A005107, A005108, A081633, A081634, A081635, A081636, A081637, A081638, A081639, A005113, A019268.

%Y Cf. A084071, A090468, A129474, A129475.

%K nonn

%O 1,1

%A _Jonathan Vos Post_, Dec 16 2004

%E More terms from _David Wasserman_, Mar 26 2008