OFFSET
1,1
COMMENTS
The "up-arrow" symbol is free, since that is indicated by a superscript.
Additional terms are possible if the double factorial (!!) operator is permitted. [From Sean A. Irvine, Mar 14 2010]
EXAMPLE
120=5!, 125=5^3, ..., 59050 = 9^5 + 1, ..., 1354984 = 9^6 + 7^7, ...
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Alan Frank, Feb 28 2009
EXTENSIONS
Edited by N. J. A. Sloane, Mar 27 2009
Corrected and extended by Sean A. Irvine, Mar 14 2010
STATUS
approved