|
|
A152709
|
|
Number of permutations of floor(i*9/4), i=0..n-1, with all sums of 8 adjacent terms unique.
|
|
0
|
|
|
1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3450240, 35472960, 395547264, 4852239744, 62627145792, 863717983936, 12684400590400
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|