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!)
A230751 Number of (n+3)X(2+3) 0..2 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 1
192, 5544, 178608, 4838400, 129731328, 3423037464, 90231813552, 2371911724800, 62340751389888, 1637784374230152, 43026042037169712, 1130254426477308672, 29690633338904531712, 779934263524825538808, 20487845491955757699888 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A230757
LINKS
FORMULA
Empirical: a(n) = 31*a(n-1) -3864*a(n-3) +14574*a(n-4) +37518*a(n-5) -238176*a(n-6) +1739072*a(n-7) -6602591*a(n-8) -1491775*a(n-9) +16560784*a(n-10) +89336824*a(n-11) -386330924*a(n-12) -86274348*a(n-13) +1166624784*a(n-14) -2006665968*a(n-15) +6479579969*a(n-16) -3512617823*a(n-17) +540133040*a(n-18) -4346818712*a(n-19) +7862435998*a(n-20) -5792501698*a(n-21) +1019133200*a(n-22) -2919714960*a(n-23) -5125129473*a(n-24) -560243617*a(n-25) +332641792*a(n-26) -444124168*a(n-27) -992749888*a(n-28) +21841536*a(n-29) -8986624*a(n-30) -13069312*a(n-31) -25735168*a(n-32) +1699840*a(n-33) -32768*a(n-35) +262144*a(n-36)
EXAMPLE
Some solutions for n=1
..0..0..2..0..2....0..2..2..2..2....0..1..0..1..1....0..2..2..0..2
..2..1..1..0..2....1..1..0..0..0....0..1..2..2..0....0..1..1..0..2
..1..1..0..2..1....0..0..0..1..1....2..0..1..2..1....0..1..1..0..2
..0..2..0..2..1....2..2..2..2..0....2..0..1..0..1....0..2..2..0..2
CROSSREFS
Sequence in context: A168635 A299863 A223421 * A223375 A233154 A292076
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 29 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 July 22 17:11 EDT 2024. Contains 374540 sequences. (Running on oeis4.)