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R. K. Guy, Unsolved Problems in Number Theory, A2.
Lior Manor, Table of n, a(n) for n = 1..1494 (first 1044 terms from Charles R Greathouse IV)
R. K. Guy, Letter to N. J. A. Sloane, 1987
Eric Weisstein's World of Mathematics, Fortunate Prime
Sequence in context: A049231 A268629 A092195 * A045398 A162565 A321363
Adjacent sequences: A046063 A046064 A046065 * A046067 A046068 A046069
Eric W. Weisstein