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URL: https://oeis.org/A392193

⇱ A392193 - OEIS

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A392193
a(n) is the minimum permanent of an n X n circulant matrix whose rows are permutations of [0, 1, 2, ..., n-1].
5
1, 0, 1, 9, 164, 4930, 222468, 13846245, 1133788866, 118120672980, 15268514307713, 2398373104558453
OFFSET
0,4
LINKS
Eric Weisstein's World of Mathematics, Circulant Matrix.
Wikipedia, Circulant matrix.
EXAMPLE
a(4) = 164:
[3, 0, 1, 2]
[2, 3, 0, 1]
[1, 2, 3, 0]
[0, 1, 2, 3]
CROSSREFS
Cf. A392190 (max det), A392191 (min det), A392192 (max permanent).
Sequence in context: A354900 A354892 A377329 * A086759 A053130 A219074
KEYWORD
nonn,hard,more
AUTHOR
Stefano Spezia, Jan 03 2026
EXTENSIONS
a(10)-a(11) from Hugo Pfoertner, Jan 06 2026
STATUS
approved