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A125456
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Number of base 21 circular n-digit numbers with adjacent digits differing by 8 or less.
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0
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1, 21, 285, 3333, 44589, 609441, 8484027, 119207781, 1683956109, 23857954869, 338563579455, 4808766812871, 68334330572247, 971314874179749, 13808436456553037, 196319581589707923, 2791268881281069805
(list;
graph;
refs;
listen;
history;
text;
internal format)
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