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A245428
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Number of nonnegative integers with property that their base 10/3 expansion (see A024658) has n digits.
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0
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10, 30, 100, 330, 1100, 3670, 12230, 40770, 135900, 453000, 1510000, 5033330, 16777770, 55925900, 186419660, 621398870, 2071329570, 6904431900, 23014773000, 76715910000, 255719700000, 852399000000, 2841330000000, 9471100000000, 31570333333330, 105234444444430
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(2) = 30 because 30, 31,.., 60, 61, .., 98 and 99 are the base 10/3 expansions for the integers 10, 11, .., 20, 21,.., 38, and 39 respectively and these are the only integers with 2 digits.
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PROG
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(Sage)
A=[1]
for i in [1..60]:
A.append(ceil(((10-3)/3)*sum(A)))
[10*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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