A245342 - OEIS

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A245342

Sum of digits of n written in fractional base 7/2.

0, 1, 2, 3, 4, 5, 6, 2, 3, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 9, 10, 6, 7, 8, 9, 10, 11, 12, 3, 4, 5, 6, 7, 8, 9, 5, 6, 7, 8, 9, 10, 11, 7, 8, 9, 10, 11, 12, 13, 4, 5, 6, 7, 8, 9, 10, 6, 7, 8, 9, 10, 11, 12, 8, 9, 10, 11, 12, 13, 14, 10, 11, 12, 13, 14, 15, 16, 7

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

The base 7/2 expansion is unique and thus the sum of digits function is well-defined.

LINKS

Table of n, a(n) for n=0..77.

FORMULA

a(n) = A007953(A024639(n)).

EXAMPLE

In base 7/2 the number 14 is represented by 40 and so a(14) = 4 + 0 = 4.

PROG