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 A234163 Number of (n+1) X (2+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings). 1
 766, 4970, 32070, 208412, 1353986, 8846884, 57811490, 380032300, 2498158614, 16525702136, 109291218482, 727617468480, 4841329246098, 32438005700384, 217127834616758, 1463930354942564, 9855977995905954, 66852413995644068 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 17*a(n-1) +16*a(n-2) -1651*a(n-3) +5750*a(n-4) +45373*a(n-5) -252572*a(n-6) -278797*a(n-7) +2737923*a(n-8) +518738*a(n-9) -11300724*a(n-10) +169584*a(n-11) +18786600*a(n-12) -2246544*a(n-13) -13289184*a(n-14) +2960064*a(n-15) +3359232*a(n-16) -1119744*a(n-17). EXAMPLE Some solutions for n=3: 3 1 3 0 0 0 3 4 2 2 0 2 1 0 4 2 4 4 4 2 3 2 2 2 1 3 1 1 4 4 0 0 0 4 1 3 2 2 4 3 3 2 2 0 2 3 3 3 1 2 4 4 2 4 2 1 1 4 2 2 4 2 3 2 2 2 0 2 4 3 2 2 4 4 4 3 4 2 2 2 4 3 3 2 CROSSREFS Column 2 of A234169. Sequence in context: A343705 A247486 A125109 * A159209 A045142 A115934 Adjacent sequences: A234160 A234161 A234162 * A234164 A234165 A234166 KEYWORD nonn AUTHOR R. H. Hardin, Dec 20 2013 STATUS approved

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Last modified January 27 21:49 EST 2023. Contains 359849 sequences. (Running on oeis4.)