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A234458 T(n,k)=Number of (n+1)X(k+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant stress 1X1 tilings) 7
280, 2400, 2400, 21344, 31112, 21344, 192960, 427956, 427956, 192960, 1755520, 6049248, 9249432, 6049248, 1755520, 16026240, 86545688, 207310120, 207310120, 86545688, 16026240, 146415104, 1246417268, 4726887280, 7432565004, 4726887280 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........280.........2400..........21344............192960.............1755520

.......2400........31112.........427956...........6049248............86545688

......21344.......427956........9249432.........207310120..........4726887280

.....192960......6049248......207310120........7432565004........272404175456

....1755520.....86545688.....4726887280......272404175456......16119111514696

...16026240...1246417268...108833647220....10112283614188.....968883628673536

..146415104..17999990956..2516987045248...377695247179700...58682694920811712

.1339023360.260509952008.58398272232836.14168309891795076.3573447469469256284

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..84

FORMULA

Empirical for column k:

k=1: a(n) = 100*a(n-2) -1384*a(n-4) +1440*a(n-6)

k=2: [order 26]

EXAMPLE

Some solutions for n=2 k=4

..3..3..3..3..1....3..0..3..3..2....0..0..2..4..2....0..3..0..2..5

..0..1..2..3..2....3..1..3..4..2....0..1..2..3..2....0..4..0..3..5

..3..3..3..5..3....3..2..5..5..4....3..3..3..5..5....0..3..0..2..5

CROSSREFS

Sequence in context: A233724 A233718 A272982 * A234452 A297510 A327948

Adjacent sequences:  A234455 A234456 A234457 * A234459 A234460 A234461

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Dec 26 2013

STATUS

approved

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Last modified August 5 22:41 EDT 2021. Contains 346488 sequences. (Running on oeis4.)