OFFSET
1,1
COMMENTS
Let "0" be the digit concatenation mark, it can be replaced with a "SPACE" as well.
XO OO OO OX OO OO
Let us define OO-->1; XO-->2; OO-->3; OO-->4; OX-->5 and OO-->6.
OO OO XO OO OO OX
REFERENCES
L. Braille, Method of writing words, music and plain songs by means of dots, for use by the blind and arranged for them, 1829.
LINKS
PharmaBraille, Pharmabraille
FORMULA
Let a(0)=245, a(1)=1, a(2)=12, a(3)=14, a(4)=145, a(5)=15, a(6)=124, a(7)=1245, a(8)=125, a(9)=24, then a(n'_n''_..._n''''') = a(n'0n''0...0n'''''), where any [n]''...' is an element of [0,1,2,3,4,5,6,7,8,9].
EXAMPLE
a(0)=245, a(8636)=12501240140124, etc.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Marco Ripà, Dec 04 2012
STATUS
approved