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!)
A234225 Number of (n+1)X(6+1) 0..4 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant stress 1X1 tilings) 1
137536, 293316, 648536, 1597896, 4055128, 11145960, 31418264, 94267656, 289507096, 935746056, 3091187096, 10648070856, 37386104728, 135693045000, 499984167704, 1889644564296, 7218907939096, 28112535319176, 110246083106456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A234227

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..46

FORMULA

Empirical: a(n) = 10*a(n-1) +16*a(n-2) -460*a(n-3) +789*a(n-4) +7170*a(n-5) -23944*a(n-6) -39920*a(n-7) +246076*a(n-8) -38440*a(n-9) -1115136*a(n-10) +1151040*a(n-11) +2005056*a(n-12) -3657600*a(n-13) -331776*a(n-14) +3456000*a(n-15) -1658880*a(n-16)

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A015071 A130422 A022235 * A110598 A069336 A296341

Adjacent sequences:  A234222 A234223 A234224 * A234226 A234227 A234228

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 21 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 July 24 11:17 EDT 2021. Contains 346273 sequences. (Running on oeis4.)