OFFSET
0,3
COMMENTS
For n > 1, the matrix M(n) is singular.
EXAMPLE
a(3) = 43956:
[ 1, 2, 3]
[ 11, 22, 33]
[111, 222, 333]
MATHEMATICA
M[i_, j_]:=j(10^i-1)/9; Join[{1}, Table[Permanent[Table[M[i, j], {i, n}, {j, n}]], {n, 10}]]
PROG
(PARI) a(n) = matpermanent(matrix(n, n, i, j, j*(10^i - 1)/9)); \\ Michel Marcus, Sep 17 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Stefano Spezia, Sep 14 2023
STATUS
approved