|
|
A147940
|
|
Number of permutations of floor(i*8/7), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
|
|
0
|
|
|
1, 2, 6, 16, 54, 232, 936, 5070, 25700, 144538, 829398, 4949114, 30028194, 195791072, 1612860652, 13023036794
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|