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A245401
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Number of nonnegative integers with property that their base 8/7 expansion (see A024649) has n digits.
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0
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8, 8, 8, 8, 8, 8, 8, 8, 16, 16, 16, 16, 24, 24, 32, 32, 40, 40, 48, 56, 64, 72, 80, 96, 112, 128, 144, 160, 184, 216, 240, 280, 320, 360, 416, 472, 544, 616, 704, 808, 920, 1056, 1208, 1376, 1576, 1800, 2056, 2352, 2688, 3072, 3512, 4008, 4584
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OFFSET
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1,1
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COMMENTS
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The numbers 8-15 are represented by 70, 71, 72, 73, 74, 75, 76, 77 respectively in base 8/7. These are the only integers with two digits, and so a(2)=8.
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LINKS
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FORMULA
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PROG
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(Sage)
A=[1]
for i in [1..60]:
A.append(ceil((8-7)/7*sum(A)))
[8*x for x in A]
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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