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A126417
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Number of base 30 n-digit numbers with adjacent digits differing by two or less.
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3
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1, 30, 144, 700, 3418, 16736, 82098, 403274, 1982980, 9758780, 48058110, 236801010, 1167371680, 5757241450, 28403776808, 140176438936, 691982963722, 3416834220692, 16875210619810, 83360735329998, 411862694955416
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