|
| |
|
|
A147923
|
|
Number of permutations of floor(i*9/4), i=0..n-1, with all sums of two adjacent terms unique.
|
|
0
|
|
|
|
1, 2, 6, 16, 96, 376, 2016, 12168, 109882, 783536, 6232926, 59671520, 718155492, 7173976288, 76938806480, 981871005232
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
