|
|
A147885
|
|
Number of permutations of floor(i*5/2), i=0..n-1, with all sums of two adjacent terms unique.
|
|
0
|
|
|
1, 2, 6, 16, 74, 368, 2016, 12168, 85462, 646544, 5510236, 49722456, 500178548, 5288883744, 60900708056, 733070993472
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|