OFFSET
1,1
EXAMPLE
a(2)=floor{square((1*2^0+1*2^1+2*2^2+4*2^3)/(1*2^0+2*2^1+1*2^2))}=floor{square(4.77778)}=floor(22.8272)=22
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Wang Dan (wangdan01(AT)lycos.com), Aug 20 2003
EXTENSIONS
Definition corrected by M. F. Hasler, Jul 23 2007
STATUS
approved