14,2
Gardner, M. The Sixth Book of Mathematical Games from Scientific American. Chicago, IL: University of Chicago Press, pp. 206-207, 1984.
Table of n, a(n) for n=14..17.
Eric Weisstein's World of Mathematics, 15 Puzzle.
Sequence in context: A084031 A210507 A066275 * A184131 A014484 A110040
Adjacent sequences: A046161 A046162 A046163 * A046165 A046166 A046167
nonn,more
Eric W. Weisstein
approved