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!)
A147888 Number of permutations of floor(i*7/6), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 16, 54, 232, 1426, 8308, 57150, 397720, 3031266, 24524008, 246278170, 2524773072, 27494109560, 308909489620 (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: A147913 A147904 A147896 * A147945 A147936 A147927

Adjacent sequences:  A147885 A147886 A147887 * A147889 A147890 A147891

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 28 23:12 EST 2022. Contains 350670 sequences. (Running on oeis4.)