login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A147890
Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two adjacent terms unique.
0
1, 2, 6, 24, 96, 444, 3172, 16976, 112790, 839320, 7525858, 86947336, 816752748, 8170308628, 90956874778, 1199823762964
OFFSET
1,2
CROSSREFS
Sequence in context: A147915 A147906 A147898 * A147912 A147903 A147895
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved