login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A147933 Number of permutations of floor(i*9/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 304, 1424, 7946, 44418, 271160, 1760020, 13590836, 107901418, 882093328, 8656696052, 83441646558 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Sequence in context: A147893 A147951 A147942 * A147886 A147924 A147908

Adjacent sequences:  A147930 A147931 A147932 * A147934 A147935 A147936

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 16 18:17 EST 2022. Contains 350376 sequences. (Running on oeis4.)