login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A234031 Number of (n+1)X(3+1) 0..4 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1 1
1543, 30263, 591711, 11637549, 229271097, 4522455227, 89286112307, 1763973731193, 34868594406281, 689542829566223, 13640600287798095, 269910850141570569, 5341921598774700885, 105741580472088580363 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A234036

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 41*a(n-1) -473*a(n-2) +378*a(n-3) +15090*a(n-4) -24456*a(n-5) -191256*a(n-6) +160111*a(n-7) +1124270*a(n-8) +180876*a(n-9) -2156866*a(n-10) -1359614*a(n-11) +738304*a(n-12) +501820*a(n-13) -106672*a(n-14) -46728*a(n-15) +7920*a(n-16)

EXAMPLE

Some solutions for n=2

..3..2..3..3....1..2..2..3....2..2..2..1....4..4..3..2....0..1..2..1

..2..2..2..3....1..2..2..2....2..1..2..1....4..3..3..2....1..1..1..2

..3..2..3..3....1..1..2..1....1..1..2..1....3..4..3..2....0..1..2..1

CROSSREFS

Sequence in context: A252966 A133560 A232102 * A038009 A249008 A249473

Adjacent sequences:  A234028 A234029 A234030 * A234032 A234033 A234034

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 5 18:00 EDT 2021. Contains 346488 sequences. (Running on oeis4.)