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A153339
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Number of zig-zag paths from top to bottom of a rectangle of width 5 with n rows whose color is that of the top right corner
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0
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3, 4, 8, 12, 24, 36, 72, 108, 216, 324, 648, 972, 1944, 2916, 5832, 8748, 17496, 26244, 52488, 78732, 157464, 236196, 472392, 708588, 1417176, 2125764, 4251528, 6377292, 12754584, 19131876, 38263752, 57395628, 114791256, 172186884
(list; graph; refs; listen; history; internal format)
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