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A235676 Number of (n+1)X(5+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise 1
2644, 101398, 3824528, 143484144, 5376199876, 201368802704, 7541722428052, 282448223982692, 10578025710796398, 396159194076516486, 14836610532891874266, 555647815868404968230, 20809637555870658166622 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A235679

LINKS

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

FORMULA

Empirical: a(n) = 41*a(n-1) +24*a(n-2) -6193*a(n-3) +1924*a(n-4) +381751*a(n-5) -34904*a(n-6) -12528996*a(n-7) -2476249*a(n-8) +242251344*a(n-9) +95519778*a(n-10) -2921868601*a(n-11) -1424979978*a(n-12) +22890929984*a(n-13) +11443851546*a(n-14) -120327943002*a(n-15) -54753628073*a(n-16) +436238929060*a(n-17) +163082200640*a(n-18) -1115185281644*a(n-19) -305053074990*a(n-20) +2042426147637*a(n-21) +343600635845*a(n-22) -2705840889861*a(n-23) -185737078719*a(n-24) +2604257684139*a(n-25) -47132369846*a(n-26) -1821805821961*a(n-27) +160826214615*a(n-28) +924348718445*a(n-29) -130102603524*a(n-30) -338651235030*a(n-31) +59527885849*a(n-32) +88904498941*a(n-33) -17255577437*a(n-34) -16505197234*a(n-35) +3241956946*a(n-36) +2117356442*a(n-37) -388930038*a(n-38) -180086494*a(n-39) +28441700*a(n-40) +9406424*a(n-41) -1167836*a(n-42) -259016*a(n-43) +24152*a(n-44) +2624*a(n-45) -224*a(n-46)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A257183 A257190 A254983 * A235446 A235750 A235813

Adjacent sequences:  A235673 A235674 A235675 * A235677 A235678 A235679

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2014

STATUS

approved

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Last modified June 16 18:25 EDT 2021. Contains 345066 sequences. (Running on oeis4.)