1,1
John H. Conway, R. K. Guy, The Book of Numbers, Copernicus Press, p. 15.
Sequence in context: A135173 A114860 A001502 this_sequence A004311 A026074 A120990
Adjacent sequences: A001500 A001501 A001502 this_sequence A001504 A001505 A001506
word,nonn,bref
N. J. A. Sloane (njas(AT)research.att.com).
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