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A234985 Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
370, 1490, 6908, 35598, 189200, 1026784, 5628414, 31099742, 172847074, 965377320, 5413449562, 30458642240, 171852511344, 971861068470, 5506551903798, 31249010774954, 177562598216536, 1010006437847702, 5750035704258456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A234991

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +9*a(n-2) -317*a(n-3) +216*a(n-4) +4392*a(n-5) -4481*a(n-6) -34461*a(n-7) +37067*a(n-8) +168161*a(n-9) -177688*a(n-10) -531245*a(n-11) +547375*a(n-12) +1099678*a(n-13) -1121930*a(n-14) -1478131*a(n-15) +1530027*a(n-16) +1252813*a(n-17) -1355278*a(n-18) -636426*a(n-19) +748324*a(n-20) +180286*a(n-21) -245436*a(n-22) -25096*a(n-23) +44796*a(n-24) +1272*a(n-25) -4080*a(n-26) +144*a(n-28)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A161020 A102618 A225104 * A264895 A283359 A254288

Adjacent sequences:  A234982 A234983 A234984 * A234986 A234987 A234988

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 02 2014

STATUS

approved

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Last modified October 20 00:57 EDT 2021. Contains 348099 sequences. (Running on oeis4.)