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A124958
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Number of base 30 circular n-digit numbers with adjacent digits differing by 2 or less.
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0
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1, 30, 144, 540, 2372, 10480, 47502, 217898, 1010012, 4717872, 22176074, 104770058, 497093834, 2367032490, 11306090072, 54148325140, 259942544940, 1250461443632, 6026490869130, 29092178813042, 140648250533742
(list; graph; refs; listen; history; internal format)
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