0,5

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

V. C. Harris, Another proof of the infinitude of primes, Amer. Math. Monthly, 63 (1956), 711.

Sequence in context: A064847 A127815 A054934 this_sequence A076926 A092023 A112723

Adjacent sequences: A001681 A001682 A001683 this_sequence A001685 A001686 A001687

nonn

N. J. A. Sloane (njas(AT)research.att.com).