A245345 Sum of digits of n written in fractional base 9/2.

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.

Links

Table of n, a(n) for n=0..75.

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

Cf. A024650, A007953, A000120, A053830, A244040.

Sequence in context: A151950 A104418 A173528 * A043268 A346973 A238593

Adjacent sequences: A245342 A245343 A245344 * A245346 A245347 A245348

Keyword

nonn,base

Author

Tom Edgar, Jul 18 2014

Status

approved