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!)
A147733 Number of permutations of 0..n-1 with all sums of 2 through 4 adjacent terms squared respectively unique. 0
1, 2, 6, 24, 120, 624, 4176, 31564, 271972, 2654974, 28246094, 320329694, 4116736768, 54680271878 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

CROSSREFS

Sequence in context: A152342 A147735 A147734 * A147732 A147731 A152337

Adjacent sequences:  A147730 A147731 A147732 * A147734 A147735 A147736

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 11 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 23 17:33 EST 2022. Contains 350514 sequences. (Running on oeis4.)