|
|
A147917
|
|
Number of permutations of floor(i*4/3), i=0..n-1, with all sums of two adjacent terms unique.
|
|
0
|
|
|
1, 2, 6, 24, 74, 368, 2140, 11468, 78848, 636700, 4866484, 43893944, 452631554, 4475626268, 50128776656, 625960035472
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|