OFFSET
0,1
COMMENTS
The symbols // denote concatenation of digits in the definition, and d(n) denotes n repetitions of d, n >= 0.
LINKS
Syed Iddi Hasan, Table of n, a(n) for n = 0..248
FORMULA
If d(n) denotes n repetitions of the digit d, then a(n) = 63(n)176(n)4, where n >= 0.
EXAMPLE
631764 is a fixed point of the mapping for n=1.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Syed Iddi Hasan, Jul 20 2012
STATUS
approved