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!)
A204719 Number of (n+1)X5 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards 1
450, 5821, 67518, 727255, 7549845, 75805761, 748847269, 7296210120, 70578444334, 678972053783, 6511957878472, 62321531183337, 595707831867346, 5689489188280666, 54313414359719923, 518332212994819422 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A204723

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-1) +65*a(n-2) -2014*a(n-3) +243*a(n-4) +116940*a(n-5) -166848*a(n-6) -4177206*a(n-7) +8311505*a(n-8) +103223574*a(n-9) -231273807*a(n-10) -1879943016*a(n-11) +4377822995*a(n-12) +26237776878*a(n-13) -60973013672*a(n-14) -288002292400*a(n-15) +652256570190*a(n-16) +2531735911304*a(n-17) -5507161089400*a(n-18) -18057043358940*a(n-19) +37390631980226*a(n-20) +105483977994876*a(n-21) -206866717988958*a(n-22) -508148160120256*a(n-23) +941620739450405*a(n-24) +2028117686977836*a(n-25) -3550538779616463*a(n-26) -6725933659087278*a(n-27) +11142324614379039*a(n-28) +18557756920384556*a(n-29) -29184370788902344*a(n-30) -42588868781561294*a(n-31) +63873907719689629*a(n-32) +81144901475551854*a(n-33) -116762342636840643*a(n-34) -127899358991420664*a(n-35) +177901630984905193*a(n-36) +165841212216673590*a(n-37) -225045078669344698*a(n-38) -175476958619485124*a(n-39) +234962339938048848*a(n-40) +149787714063731872*a(n-41) -200783588357815520*a(n-42) -101473173031444224*a(n-43) +138829814174390080*a(n-44) +53244993251106048*a(n-45) -76474039873733952*a(n-46) -20808331640441600*a(n-47) +32854281566477504*a(n-48) +5625619348617344*a(n-49) -10684672575669632*a(n-50) -865167444433664*a(n-51) +2517526213069824*a(n-52) +3268384448512*a(n-53) -400848961507328*a(n-54) +27182934855680*a(n-55) +38006887096320*a(n-56) -4794757939200*a(n-57) -1584385228800*a(n-58) +273678336000*a(n-59)

EXAMPLE

Some solutions for n=4

..1..0..0..0..0....1..1..1..1..1....0..0..1..1..1....1..1..1..1..1

..1..0..1..0..1....0..1..1..1..1....1..0..0..0..0....1..0..1..0..1

..1..1..1..1..1....1..1..1..1..1....1..0..0..0..1....1..1..1..1..0

..1..1..1..1..1....0..1..1..1..1....0..0..0..0..1....0..1..0..1..1

..1..1..1..1..1....1..1..1..1..1....1..0..0..0..0....1..1..1..1..1

CROSSREFS

Sequence in context: A253150 A204224 A235438 * A235403 A204958 A189653

Adjacent sequences:  A204716 A204717 A204718 * A204720 A204721 A204722

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 18 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 28 00:25 EDT 2022. Contains 354903 sequences. (Running on oeis4.)