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!)
A209893 Number of (n+1)X5 0..2 arrays with every 2X2 subblock having two distinct values, and new values 0..2 introduced in row major order 1
792, 19008, 470736, 11857440, 299879808, 7597233712, 192567994720, 4881998439024, 123776581739664, 3138262841221104, 79568924857694176, 2017431778013841440, 51151059308792578224, 1296912123972653759648 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A209897

LINKS

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

FORMULA

Empirical: a(n) = 37*a(n-1) -224*a(n-2) -2979*a(n-3) +29449*a(n-4) +46557*a(n-5) -1073860*a(n-6) +1135122*a(n-7) +15431403*a(n-8) -33807620*a(n-9) -96498020*a(n-10) +305903160*a(n-11) +230102448*a(n-12) -1252267328*a(n-13) +63674496*a(n-14) +2499686528*a(n-15) -1105423872*a(n-16) -2340302336*a(n-17) +1583680512*a(n-18) +822790144*a(n-19) -753893376*a(n-20) -7176192*a(n-21) +78643200*a(n-22) -10485760*a(n-23)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A027817 A104680 A037190 * A184491 A140909 A282461

Adjacent sequences:  A209890 A209891 A209892 * A209894 A209895 A209896

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 14 2012

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 January 23 10:11 EST 2022. Contains 350510 sequences. (Running on oeis4.)