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A038557 Periodic derivative of n in base 3. 1
0, 2, 1, 4, 8, 0, 8, 0, 4, 10, 14, 15, 22, 26, 18, 7, 2, 3, 20, 21, 25, 5, 6, 1, 17, 9, 13, 28, 32, 33, 40, 44, 36, 52, 47, 48, 64, 68, 69, 76, 80, 72, 61, 56, 57, 19, 23, 24, 4, 8, 0, 16, 11, 12, 56, 57, 61, 68, 69, 64, 80, 72, 76, 11, 12, 16, 23, 24, 19, 8, 0, 4, 47, 48, 52, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

Simmons, G. J. The structure of the differentiation digraphs of binary sequences. Ars Combin. 35 (1993), A, 71-88. Math. Rev. 95f:05052.

LINKS

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

FORMULA

If n=b_k b_{k-1} ... b_0 in base 3, a(n) is number with ternary expansion (b_k+b_{k-1}) (b_{k-1}+b_{k-2}) ... (b_1+b_0) (b_0+b_{k}).

EXAMPLE

14=112->200 so a(14)=18.

CROSSREFS

Cf. A038554-A038556.

Sequence in context: A294501 A146004 A001933 * A011234 A208917 A161381

Adjacent sequences:  A038554 A038555 A038556 * A038558 A038559 A038560

KEYWORD

nonn,nice,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

Corrected and extended by Naohiro Nomoto, Apr 08 2001

STATUS

approved

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Last modified June 6 18:59 EDT 2020. Contains 334832 sequences. (Running on oeis4.)