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!)
A204876 T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the permanents of all 2 X 2 subblocks equal and nonzero. 9

%I #11 Jan 20 2024 14:01:36

%S 207,551,551,1467,3167,1467,4245,10397,10397,4245,12241,59377,53311,

%T 59377,12241,36285,219871,337179,337179,219871,36285,107397,1174669,

%U 1912223,4256141,1912223,1174669,107397,321317,4655229,11644559,27234451

%N T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the permanents of all 2 X 2 subblocks equal and nonzero.

%C Table starts

%C ....207......551......1467........4245........12241..........36285

%C ....551.....3167.....10397.......59377.......219871........1174669

%C ...1467....10397.....53311......337179......1912223.......11644559

%C ...4245....59377....337179.....4256141.....27234451......320519921

%C ..12241...219871...1912223....27234451....282748327.....3677014705

%C ..36285..1174669..11644559...320519921...3677014705....94493071327

%C .107397..4655229..67916249..2202663919..41067117035..1170722541163

%C .321317.23670949.409180861.24594710265.514372854783.28674816027923

%H R. H. Hardin, <a href="/A204876/b204876.txt">Table of n, a(n) for n = 1..180</a>

%e Some solutions for n=4, k=3

%e ..3..0..3..3....3..3..3..2....2..2..1..2....0..1..2..0....1..2..0..2

%e ..0..1..0..1....3..0..3..1....3..0..3..0....2..0..2..1....0..2..1..2

%e ..3..3..3..0....2..3..3..2....3..2..0..2....0..1..2..0....1..2..0..2

%e ..0..1..0..1....1..3..0..3....0..2..3..2....2..1..0..1....0..2..1..3

%e ..3..1..3..2....2..3..3..3....3..2..0..2....0..1..2..2....1..2..0..2

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Jan 20 2012

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 March 29 06:34 EDT 2024. Contains 371265 sequences. (Running on oeis4.)