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!)
A234146 Number of (n+1) X (1+1) 0..5 arrays with every 2 X 2 subblock having the sum of the absolute values of the edge differences equal to 10 and no adjacent elements equal. 1
184, 1264, 8752, 62004, 439572, 3129240, 22275612, 158687156, 1130414100, 8053620640, 57377216736, 408788140012, 2912431493704, 20749855456308, 147833924812756, 1053254915776492, 7503999725717600, 53462860382183344 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 6*a(n-1) + 25*a(n-2) - 105*a(n-3) - 192*a(n-4) + 494*a(n-5) + 478*a(n-6) - 322*a(n-7) - 204*a(n-8).
Empirical g.f.: 4*x*(46 + 40*x - 858*x^2 - 697*x^3 + 4199*x^4 + 3115*x^5 - 2673*x^6 - 1530*x^7) / ((1 - 6*x - 25*x^2 + 105*x^3 + 192*x^4 - 494*x^5 - 478*x^6 + 322*x^7 + 204*x^8)). - Colin Barker, Oct 13 2018
EXAMPLE
Some solutions for n=4:
4 5 3 0 4 2 2 5 2 0 3 0 2 3 0 2 3 1 3 2
5 1 4 5 0 3 0 1 5 2 5 1 5 1 5 4 2 5 0 4
3 0 0 1 2 0 4 5 1 0 3 4 4 0 0 3 0 2 4 3
5 1 5 3 5 2 0 2 5 4 5 1 5 3 3 1 5 4 0 4
2 0 4 0 3 5 4 5 1 0 2 0 4 0 1 4 4 0 3 2
CROSSREFS
Column 1 of A234152.
Sequence in context: A235251 A233676 A234152 * A164997 A121733 A235250
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2013
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 February 28 01:06 EST 2024. Contains 370379 sequences. (Running on oeis4.)