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A059679
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Triangle T(n,k) giving number of fixed 3 X k polyominoes with n cells (n >= 3, 1<=k<=n-2).
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5
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1, 0, 8, 0, 6, 25, 0, 1, 44, 50, 0, 0, 32, 154, 83, 0, 0, 9, 212, 376, 124, 0, 0, 1, 158, 784, 750, 173, 0, 0, 0, 62, 987, 2133, 1316, 230, 0, 0, 0, 12, 778, 3802, 4803, 2114, 295, 0, 0, 0, 1, 370, 4622, 11127, 9490, 3184, 368
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OFFSET
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3,3
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LINKS
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Andrew Howroyd, Table of n, a(n) for n = 3..1277
R. C. Read, Contributions to the cell growth problem, Canad. J. Math., 14 (1962), 1-20.
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FORMULA
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T(n,k) = 0 for n > 3*k. - Andrew Howroyd, Oct 02 2017
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EXAMPLE
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Triangle starts:
1;
0, 8;
0, 6, 25;
0, 1, 44, 50;
0, 0, 32, 154, 83;
0, 0, 9, 212, 376, 124;
0, 0, 1, 158, 784, 750, 173;
0, 0, 0, 62, 987, 2133, 1316, 230;
...
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CROSSREFS
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Column sums are A034184.
Cf. A059678, A059680, A059681, A059683.
Sequence in context: A073235 A222883 A091474 * A198559 A292887 A154461
Adjacent sequences: A059676 A059677 A059678 * A059680 A059681 A059682
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KEYWORD
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nonn,easy,nice,tabl
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AUTHOR
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N. J. A. Sloane, Feb 05 2001
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EXTENSIONS
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a(8) corrected and terms a(39) and beyond from Andrew Howroyd, Oct 02 2017
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STATUS
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approved
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