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A245349
Sum of digits of n in fractional base 7/4.
0
0, 1, 2, 3, 4, 5, 6, 4, 5, 6, 7, 8, 9, 10, 5, 6, 7, 8, 9, 10, 11, 9, 10, 11, 12, 13, 14, 15, 7, 8, 9, 10, 11, 12, 13, 11, 12, 13, 14, 15, 16, 17, 12, 13, 14, 15, 16, 17, 18, 7, 8, 9, 10, 11, 12, 13, 11, 12, 13, 14, 15, 16, 17, 12, 13, 14, 15, 16, 17
OFFSET
0,3
COMMENTS
The base 7/4 expansion is unique, and thus the sum of digits function is well-defined.
EXAMPLE
In base 7/4 the number 7 is represented by 40 and so a(7) = 4 + 0 = 4.
PROG
(Sage) # uses [basepqsum from A245355]
[basepqsum(7, 4, y) for y in [0..200]]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
James Van Alstine, Jul 18 2014
STATUS
approved