A079926 Solution to the Dancing School Problem with n girls and n+7 boys: f(n,7).

8, 57, 364, 2106, 11196, 55532, 260720, 1173240, 5112544, 21670160, 89700624, 363862092, 1450606028, 5697401802, 22088730348, 84669409935, 321307769052, 1208513572803, 4509661963752, 16709568237540

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.

Links

Table of n, a(n) for n=1..20.

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

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

Crossrefs

Cf. A079908-A079928.

Sequence in context: A096711 A282394 A244201 * A346228 A283125 A108666

Adjacent sequences: A079923 A079924 A079925 * A079927 A079928 A079929

Keyword

nonn

Author

Jaap Spies, Jan 28 2003

Extensions

Corrected by Jaap Spies, Feb 01 2004

More terms Dec 14 2006

Status

approved