1,1

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).

D. Shanks, Review of "K. E. Kloss et al., Class number of primes of the form 4n+1", Math. Comp., 23 (1969), 213-214.

Sequence in context: A066462 A046193 A112999 this_sequence A103732 A065757 A157776

Adjacent sequences: A002139 A002140 A002141 this_sequence A002143 A002144 A002145

nonn

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