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!)
A240702 Number of nX4 0..3 arrays with no element equal to a different number of vertical neighbors than horizontal neighbors, with new values 0..3 introduced in row major order 1
5, 193, 7980, 332412, 13844254, 576606991, 24015292771, 1000221764213, 41658596795154, 1735053968891083, 72263890048725573, 3009744886107001662, 125353953016217917597, 5220912114439726318651, 217447656421647208273762 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A240706

LINKS

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

FORMULA

Empirical: a(n) = 45*a(n-1) -79*a(n-2) -2693*a(n-3) +6906*a(n-4) +11122*a(n-5) -82634*a(n-6) -122470*a(n-7) +1250800*a(n-8) -381472*a(n-9) -4689240*a(n-10) +10859688*a(n-11) +12837510*a(n-12) -33250446*a(n-13) -54296730*a(n-14) +18494730*a(n-15) +56054997*a(n-16) +33620751*a(n-17) +59068683*a(n-18) -29229255*a(n-19) -70150212*a(n-20)

EXAMPLE

Some solutions for n=3

..0..1..0..1....0..0..1..2....0..1..0..2....0..1..2..1....0..1..0..2

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

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

CROSSREFS

Sequence in context: A198485 A177192 A100760 * A240639 A198482 A198523

Adjacent sequences:  A240699 A240700 A240701 * A240703 A240704 A240705

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 10 2014

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 May 28 04:36 EDT 2020. Contains 334671 sequences. (Running on oeis4.)