OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n=1,...,2000
FORMULA
a(n) = floor[ {n * R(n)}^(1/2)], where R(n)= the digit reversal of n (A004086).
EXAMPLE
a(15)=floor(sqrt(15*51))=floor(sqrt(765))=27.
PROG
(PARI) { default(realprecision, 100); for (n=1, 2000, x=n; r=0; while (x>0, d=x-10*(x\10); x\=10; r=r*10 + d); write("b061229.txt", n, " ", floor(sqrt(n*r))) ) } \\ Harry J. Smith, Jul 19 2009
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Apr 23 2001
EXTENSIONS
Edited by N. J. A. Sloane, Jan 17 2009 at the suggestion of R. J. Mathar
STATUS
approved