|
| |
|
|
A090014
|
|
Permanent of (0,1)-matrix of size n X (n+d) with d=4 and n-1 zeros not on a line.
|
|
0
| |
|
|
5, 25, 155, 1135, 9545, 90445, 952175, 11016595, 138864365, 1893369505, 27756952355, 435287980375, 7269934161905, 128812336516885, 2413131201408695, 47652865538001595, 989254278781162325
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
REFERENCES
| Brualdi, Richard A. and Ryser, Herbert J., Combinatorial Matrix Theory, Cambridge NY (1991), Chapter 7.
Seok-Zun Song et al., Extremes of permanents of (0,1)-matrices, Lin. Algebra and its Applic. 373 (2003), p. 197-210.
|
|
|
FORMULA
| a(n) = (n+3)*a(n-1) + (n-2)*a(n-2), a(1)=5, a(2)=25
|
|
|
CROSSREFS
| a(n) = A001909(n-1) + A001909(n), a(1)=5
Cf. A000255, A000153, A000261, A001909, A001910, A090010, A055790, A090012-A090016.
Sequence in context: A092166 A204209 A121112 * A179324 A097145 A085644
Adjacent sequences: A090011 A090012 A090013 * A090015 A090016 A090017
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| Jaap Spies (j.spies(AT)hccnet.nl), Dec 13 2003
|
|
|
EXTENSIONS
| Corrected by Jaap Spies (j.spies(AT)hccnet.nl), Jan 26 2004
|
| |
|
|
