|
Search: id:A058003
|
|
|
| A058003 |
|
Number of 5 X 5 matrices with entries mod n, up to row and column permutation. |
|
+0
3
|
|
| 1, 5624, 64796982, 79846389608, 20834113243925, 1979525296377132, 93242242505023122, 2625154125717590496, 49871029909245781491, 694584034909225304800, 7525039263469551291908, 66252712846754819753160
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Number of k X l matrices with entries mod n, up to row and column permutation is Z(S_k X S_l; n,n,...) where Z(S_k X S_l; x_1,x_2,...) is cycle index of Cartesian product of symmetric groups S_k and S_l of degree k and l, respectively.
|
|
FORMULA
|
a(n)=(1/5!^2)*(n^25 + 20*n^20 + 100*n^17 + 70*n^15 + 300*n^14 + 225*n^13 + 400*n^12 + 400*n^11 + 100*n^10 + 1600*n^9 + 2300*n^8 + 1300*n^7 + 1200*n^6 + 1824*n^5 + 480*n^4 + 1680*n^3 + 2400*n^2).
|
|
CROSSREFS
|
Cf. A039623, A058001, A058002, A058004, A002724, A052271, A052272.
Sequence in context: A071813 A074242 A032737 this_sequence A014799 A031663 A031573
Adjacent sequences: A058000 A058001 A058002 this_sequence A058004 A058005 A058006
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 04 2000
|
|
EXTENSIONS
|
More terms from James A. Sellers (sellersj(AT)math.psu.edu), Nov 08 2000
|
|
|
Search completed in 0.002 seconds
|
