OFFSET
0,3
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.
EXAMPLE
a(2) = reverse(9*2)/9 = reverse(18)/9 = 81/9 = 9.
PROG
(PARI) {for(n=0, 73, k=9*n; rev=0; while(k>0, d=divrem(k, 10); k=d[1]; rev=10*rev+d[2]); print1(rev/9, ", "))}
(PARI) apply( {A083824(n)=fromdigits(Vecrev(digits(9*n)))/9}, [0..99]) \\ M. F. Hasler, May 21 2021
CROSSREFS
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
Minor edits and extension to offset 0 by M. F. Hasler, May 21 2021
STATUS
approved