login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A190837 Number of permutations of 8 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1. 6
1, 0, 1, 400598, 1530622143864, 28920026907938624194, 2070756746775910218326948065, 459408385876250801291447710561829082, 271259741131895052775392614041761701799270286, 379065045836307787068046364731543393514652159389593652 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..78

FORMULA

a(n) ~ sqrt(8) * 131072^n * n^(7*n) / (315^n * exp(7*n + 7)). - Vaclav Kotesovec, Nov 24 2018

EXAMPLE

Some solutions for n=3

..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1

..2....2....2....2....2....2....2....2....2....2....2....2....2....2....2....2

..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1

..2....2....2....3....2....3....2....2....3....2....2....2....3....2....2....2

..3....3....3....1....3....1....1....1....1....1....1....3....1....3....3....3

..2....1....1....3....1....2....2....3....2....3....3....1....3....1....2....1

..3....3....2....1....2....1....3....2....3....1....1....3....1....3....3....2

..1....2....3....2....1....2....1....1....2....3....3....2....2....2....2....3

..3....1....1....1....3....1....2....3....3....2....1....1....3....3....3....2

..1....3....2....2....2....2....1....2....1....1....2....3....1....1....2....3

..2....1....1....1....3....3....3....1....3....3....1....2....3....3....3....1

..1....3....3....3....1....1....1....2....1....2....2....3....2....2....1....3

..2....2....1....2....3....3....2....3....3....3....3....2....3....3....2....2

..3....3....3....3....1....1....3....1....2....2....2....3....2....2....1....3

..1....1....2....2....3....3....2....3....1....3....3....1....1....3....2....1

..3....3....3....3....2....2....3....2....3....2....1....3....3....1....3....3

..2....2....1....1....3....3....1....3....2....1....2....1....2....3....1....2

..1....3....3....3....2....2....3....2....3....3....3....2....1....2....3....1

..3....2....2....2....3....1....1....1....2....2....2....1....2....3....1....2

..2....1....3....3....1....3....3....3....3....3....3....3....3....1....3....3

..3....2....1....2....2....2....2....1....2....1....1....1....2....2....1....1

..1....3....2....3....1....3....3....3....1....3....3....2....1....1....3....3

..2....2....3....1....3....2....2....2....2....2....2....3....3....2....2....2

..3....1....2....2....2....3....3....3....1....1....3....2....2....1....1....1

CROSSREFS

Sequence in context: A015424 A083634 A209910 * A205094 A234419 A096890

Adjacent sequences:  A190834 A190835 A190836 * A190838 A190839 A190840

KEYWORD

nonn

AUTHOR

R. H. Hardin May 21 2011

EXTENSIONS

a(0)=1 prepended and a(7)-a(9) added by Seiichi Manyama, Nov 16 2018

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 November 20 13:19 EST 2019. Contains 329336 sequences. (Running on oeis4.)