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A234453 Number of (n+1) X (2+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1 (constant-stress 1 X 1 tilings). 1
2400, 31112, 427956, 6049248, 86545688, 1246417268, 17999990956, 260509952008, 3772324919216, 54683798470992, 792660439569184, 11498882870642596, 166774556604227496, 2420540967413065532, 35121760962460304188 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n) = 24*a(n-1) +202*a(n-2) -8375*a(n-3) +18366*a(n-4) +832456*a(n-5) -4372543*a(n-6) -32845569*a(n-7) +252119346*a(n-8) +475222218*a(n-9) -6386106484*a(n-10) +1228195800*a(n-11) +78155524488*a(n-12) -93005666672*a(n-13) -459032184864*a(n-14) +814396694400*a(n-15) +1253941668864*a(n-16) -2968493257344*a(n-17) -1338994735872*a(n-18) +5126543725056*a(n-19) -147546633728*a(n-20) -4053307347968*a(n-21) +1013644265472*a(n-22) +1200673271808*a(n-23) -333045153792*a(n-24) -113446158336*a(n-25) +22613852160*a(n-26).
EXAMPLE
Some solutions for n=2:
0 3 2 1 1 0 3 2 1 4 3 2 2 2 2 4 5 1 1 0 1
0 2 2 1 2 2 4 2 2 5 3 1 3 2 3 2 4 1 5 3 5
3 4 3 3 5 4 4 3 4 5 4 3 5 5 5 1 2 0 1 0 3
CROSSREFS
Column 2 of A234458.
Sequence in context: A204357 A043420 A233880 * A236084 A204304 A235414
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 26 2013
STATUS
approved

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Last modified April 12 19:05 EDT 2024. Contains 371636 sequences. (Running on oeis4.)