|
Search: id:A070212
|
|
|
| A070212 |
|
Number of 5 X 5 pandiagonal magic squares with sum n. |
|
+0
2
|
|
| 1, 10, 55, 220, 715, 2001, 4995, 11385, 24090, 47905, 90376, 162955, 282490, 473110, 768570, 1215126, 1875015, 2830620, 4189405, 6089710, 8707501, 12264175, 17035525, 23361975, 31660200, 42436251, 56300310, 73983205
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
REFERENCES
|
Maya Ahmed, Jesus De Loera and Raymond Hemmecke, Polyhedral cones of magic cubes and squares, in Discrete and Computational Geometry, Springer, Berlin, 2003, pp. 25-41,
|
|
LINKS
|
M. Ahmed, J. De Loera, R. Hemmecke, Polyhedral Cones of Magic Cubes and Squares
|
|
FORMULA
|
a(n) = (1/8064) * (n+4)*(n+3)*(n+2)*(n+1)*(n^2+5n+8)*(n^2+5n+42)
|
|
PROGRAM
|
(PARI) for(n=0, 20, print1(1/8064*(n+4)*(n+3)*(n+2)*(n+1)*(n^2+5*n+8)*(n^2+5*n+42), ", "))
|
|
CROSSREFS
|
Sequence in context: A069155 A107352 A127761 this_sequence A008502 A008492 A023035
Adjacent sequences: A070209 A070210 A070211 this_sequence A070213 A070214 A070215
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Sharon Sela (sharonsela(AT)hotmail.com), May 07 2002
|
|
EXTENSIONS
|
More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), May 12 2002
|
|
|
Search completed in 0.002 seconds
|
