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A245345
Sum of digits of n written in fractional base 9/2.
0
0, 1, 2, 3, 4, 5, 6, 7, 8, 2, 3, 4, 5, 6, 7, 8, 9, 10, 4, 5, 6, 7, 8, 9, 10, 11, 12, 6, 7, 8, 9, 10, 11, 12, 13, 14, 8, 9, 10, 11, 12, 13, 14, 15, 16, 3, 4, 5, 6, 7, 8, 9, 10, 11, 5, 6, 7, 8, 9, 10, 11, 12, 13, 7, 8, 9, 10, 11, 12, 13, 14, 15, 9, 10, 11, 12
OFFSET
0,3
COMMENTS
The base 9/2 expansion is unique and thus the sum of digits function is well-defined.
FORMULA
a(n) = A007953(A024650(n))
EXAMPLE
In base 9/2 the number 19 is represented by 41 and so a(19) = 4 + 1 = 5.
PROG
(Sage) # uses [basepqsum from A245355]
[basepqsum(9, 2, i) for i in [0..100]]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Tom Edgar, Jul 18 2014
STATUS
approved