login
A147938
Number of permutations of floor(i*7/5), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
0
1, 2, 6, 24, 74, 372, 1764, 9076, 51988, 292392, 2059488, 14021462, 105081158, 851532252, 6805717470, 64732937542
OFFSET
1,2
CROSSREFS
Sequence in context: A147928 A147920 A147947 * A147929 A147921 A263712
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved