OFFSET
0,3
EXAMPLE
n=26: reverse(2^26) = 46880176 = 2^4*7*641*653, so a(26)=7.
n=38: reverse(2^38) = 449609778472 = 2^3*56201222309, so a(38)=4. - Sean A. Irvine, Sep 26 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jan 06 2005
EXTENSIONS
a(38) corrected by Sean A. Irvine, Sep 26 2023
STATUS
approved