|
|
A156413
|
|
Number of 13 X 13 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
|
|
0
|
|
|
1, 1384, 481320, 23622288, 667960824, 4186295040, 26532092944, 72256187200, 617153224314, 1117730631388, 5750051401712, 11298978667872, 59576593947316, 150978985010061, 286675559366712, 512365063156800
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|