1,3

A. P. Domoryad, Mathematical Games and Pastimes. Macmillan, NY, 1964, p. 259.

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

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

Sequence in context: A018414 A002152 A163522 this_sequence A162842 A164901 A109853

Adjacent sequences: A002463 A002464 A002465 this_sequence A002467 A002468 A002469

nonn

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