

A083822


a(n) = digit reversal of 3*n divided by 3.


5



1, 2, 3, 7, 17, 27, 4, 14, 24, 1, 11, 21, 31, 8, 18, 28, 5, 15, 25, 2, 12, 22, 32, 9, 19, 29, 6, 16, 26, 3, 13, 23, 33, 67, 167, 267, 37, 137, 237, 7, 107, 207, 307, 77, 177, 277, 47, 147, 247, 17, 117, 217, 317, 87, 187, 287, 57, 157, 257, 27, 127, 227, 327, 97, 197, 297, 34
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OFFSET

1,2


COMMENTS

If n is a multiple of 10, then a(n) = a(n/10); if n is not a multiple of 10, then a(a(n)) = n.


LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000


EXAMPLE

a(25) = reverse(3*25)/3 = reverse(75)/3 = 57/3 = 19.


MATHEMATICA

Table[FromDigits[Reverse[IntegerDigits[3n]]]/3, {n, 70}] (* Harvey P. Dale, May 19 2015 *)


PROG

(PARI) {for(n=1, 70, k=3*n; rev=0; while(k>0, d=divrem(k, 10); k=d[1]; rev=10*rev+d[2]); print1(rev/3, ", "))}


CROSSREFS

Cf. A083823, A083824, A083825.
Sequence in context: A245590 A110480 A268539 * A030086 A078721 A077007
Adjacent sequences: A083819 A083820 A083821 * A083823 A083824 A083825


KEYWORD

base,easy,nonn


AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 08 2003


EXTENSIONS

Edited, corrected and extended by Klaus Brockhaus, May 11 2003


STATUS

approved



