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

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

(Sage) # uses [basepqsum from A245355]
[basepqsum(7, 2, w) for w in [0..200]]

Crossrefs

Cf. A007953, A000120, A024639, A053828, A244040.

Sequence in context: A105257 A125937 A173526 * A203580 A043266 A082120

Adjacent sequences: A245339 A245340 A245341 * A245343 A245344 A245345

Keyword

nonn,base

Author

Hailey R. Olafson, Jul 18 2014

Status

approved