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A174726 a(n) = (A002033(n-1) - A008683(n))/2 5
0, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 4, 1, 1, 1, 4, 1, 4, 1, 4, 1, 1, 1, 10, 1, 1, 2, 4, 1, 7, 1, 8, 1, 1, 1, 13, 1, 1, 1, 10, 1, 7, 1, 4, 4, 1, 1, 24, 1, 4, 1, 4, 1, 10, 1, 10, 1, 1, 1, 22, 1, 1, 4, 16, 1, 7, 1, 4, 1, 7, 1, 38, 1, 1, 4, 4, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

a(n) is the number of permutation matrices with a negative contribution to the determinant that is the Möbius function. See A174725 for how the determinant is defined. - Mats Granvik, May 26 2017

LINKS

Mats Granvik, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = (A002033(n-1) - A008683(n))/2. - Mats Granvik, May 26 2017

CROSSREFS

Cf. A074206, A174725, A008683, A051731.

Sequence in context: A122374 A261960 A010121 * A300239 A299203 A329036

Adjacent sequences:  A174723 A174724 A174725 * A174727 A174728 A174729

KEYWORD

nonn

AUTHOR

Mats Granvik, Mar 28 2010

STATUS

approved

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Last modified November 12 22:16 EST 2019. Contains 329079 sequences. (Running on oeis4.)