A245420 Number of nonnegative integers with property that their base 8/5 expansion (see A024647) has n digits.

8, 8, 16, 24, 40, 64, 96, 160, 256, 408, 648, 1040, 1664, 2664, 4264, 6816, 10912, 17456, 27928, 44688, 71496, 114400, 183040, 292864, 468576, 749728, 1199560, 1919296, 3070872, 4913400, 7861440, 12578304, 20125288, 32200456, 51520728, 82433168, 131893072

Offset

1,1

Links

Table of n, a(n) for n=1..37.

Example

a(2) = 8 because 50, 51, 52, 53, 54, 55, 56, and 57 are the base 8/5 expansions for the numbers 8-15 respectively and these are the only integers with 2 digits.

Prog

(Sage)
A=[1]
for i in [1..100]:
    A.append(ceil(((8-5)/5)*sum(A)))
[8*x for x in A]

Crossrefs

Cf. A024647, A245356, A081848.

Sequence in context: A186986 A112439 A309461 * A022091 A171188 A145909

Adjacent sequences: A245417 A245418 A245419 * A245421 A245422 A245423

Keyword

nonn,base

Author

Tom Edgar, Jul 21 2014

Status

approved