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A079928 Solution to the Dancing School Problem with n girls and n+9 boys: f(n,9). 20
10, 91, 756, 5766, 40688, 268108, 1666000, 9856552, 56010096, 308055528, 1650607040, 8641355080, 44321202192, 223245029176, 1106667645872, 5409040818588, 26108349881112, 124618084809174, 588875653169028 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

f(g,h) = per(B), the permanent of the (0,1)-matrix B of size g X g+h with b(i,j)=1 if and only if i <= j <= i+h. See A079908 for more information.

REFERENCES

Jaap Spies, Dancing School Problems, Nieuw Archief voor Wiskunde 5/7 nr. 4, Dec 2006, pp. 283-285.

LINKS

Table of n, a(n) for n=1..19.

Jaap Spies, Dancing School Problems, Permanent solutions of Problem 29.

CROSSREFS

Cf. A079908-A079927.

Sequence in context: A143572 A244203 A002739 * A231412 A002452 A096261

Adjacent sequences:  A079925 A079926 A079927 * A079929 A079930 A079931

KEYWORD

nonn

AUTHOR

Jaap Spies, Jan 28 2003

EXTENSIONS

Corrected by Jaap Spies, Feb 01 2004

More terms Dec 15 2006

STATUS

approved

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Last modified May 21 22:24 EDT 2019. Contains 323467 sequences. (Running on oeis4.)