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!)
A269487 Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by one. 1
2, 9, 64, 617, 7616, 114695, 2039274, 41805237, 970685708, 25177153349, 721451342084, 22633337514825, 771536819904130, 28396264745292221, 1122246922078022962, 47400301233243564613, 2130783065991229960608 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A269494.
LINKS
FORMULA
Conjecture: a(n) ~ exp(1) * n^n. - Vaclav Kotesovec, Feb 28 2016
EXAMPLE
Some solutions for n=6
..1. .1. .1. .0. .3. .2. .3. .0. .4. .3. .4. .3. .0. .4. .3. .3
..5. .4. .5. .4. .3. .2. .2. .2. .1. .5. .6. .3. .5. .6. .5. .3
..0. .6. .2. .3. .1. .2. .2. .0. .5. .2. .3. .0. .3. .1. .0. .2
..5. .0. .1. .2. .1. .4. .3. .1. .4. .0. .5. .2. .1. .5. .4. .4
..2. .0. .5. .6. .1. .2. .0. .4. .1. .0. .0. .3. .3. .6. .3. .6
..1. .2. .3. .1. .2. .1. .1. .1. .1. .1. .0. .2. .1. .6. .3. .1
CROSSREFS
Cf. A269494.
Sequence in context: A268104 A269683 A331658 * A179199 A036775 A141209
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 28 2016
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)