|
|
A004076
|
|
Number of hooked Skolem sequences of order n.
|
|
1
|
|
|
0, 1, 2, 0, 0, 38, 124, 0, 0, 12808, 72648, 0, 0, 21878816, 168870048, 0, 0, 113071735648, 1105816948032, 0, 0, 1395701792232832
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
REFERENCES
|
CRC Handbook of Combinatorial Designs, 1996, p. 460.
|
|
LINKS
|
|
|
EXAMPLE
|
For n = 3, there are 2 solutions: 1 1 2 3 2 0 3 and 3 1 1 3 2 0 2.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
a(15)-a(18) from Jeppe Winther Larsen (jwl(AT)itu.dk), Oct 12 2009
|
|
STATUS
|
approved
|
|
|
|