Ball, W. W. Rouse (Walter William Rouse), 1850-1925 · London, Macmillan · leaf 203
we arrange the dominoes in a straight line, then as wemay begin with any of the 15 dominoes, the total number ofarrangements is 15 . 2. a. We have next to find the number of unicursal routes ofthe pentagon delineated above in figure A. At the node 0there are four paths which may be coupled in three…
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