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 A083822 a(n) = digit reversal of 3*n, divided by 3. 6
 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 (list; graph; refs; listen; history; text; internal format)
 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 *) IntegerReverse[3*Range[70]]/3 (* Harvey P. Dale, Apr 12 2022 *) 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, ", "))} (PARI) apply( A083822(n)=fromdigits(Vecrev(digits(3*n)))/3, [0..99]) \\ M. F. Hasler, May 21 2021 CROSSREFS Cf. A083823, A083824, A083825. Sequence in context: A110480 A338175 A268539 * A349665 A030086 A078721 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

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Last modified May 31 12:12 EDT 2023. Contains 363066 sequences. (Running on oeis4.)