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A249028
Number of 4X4X...X4 = 4^n arrays of 0's and 1's with exactly one 1 in each row, column, ..., line, ... .
2
4, 24, 576, 36972288, 6268637952000
OFFSET
1,1
EXAMPLE
a(2)=24 because these are the 4X4 0,1 matrices representing the permutations of 4 letters.
CROSSREFS
Column 4 of array in A249026.
Sequence in context: A013061 A071302 A211215 * A216092 A174245 A228191
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Oct 23 2014
STATUS
approved