OFFSET
0,1
COMMENTS
a(8) and a(9) are greater than 10^10. - Arkadiusz Wesolowski, Oct 27 2018
a(8) <= 3*7215727335550^2 = (A221669(1) + A221669(2) + A221669(3))*16978181966^2. - Arkadiusz Wesolowski, May 21 2022
LINKS
Andrew Bremner, On squares of squares II, Acta Arithmetica 99 (2001), pp. 289-308.
Multimagic Squares, Home Page
The Prime Puzzles and Problems Connection, Problem 63
Arkadiusz Wesolowski, Examples of these magic squares
Wikipedia, Magic square
CROSSREFS
KEYWORD
nonn,fini,hard,more
AUTHOR
Arkadiusz Wesolowski, Feb 14 2016
STATUS
approved