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A271465
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Array read by antidiagonals: T(n,m) = number of self-avoiding walks of any length from NW to SW corners on a grid with n rows and m columns.
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9
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1, 1, 1, 1, 2, 1, 1, 3, 4, 1, 1, 4, 11, 8, 1, 1, 5, 28, 38, 16, 1, 1, 6, 69, 178, 126, 32, 1, 1, 7, 168, 844, 1008, 415, 64, 1, 1, 8, 407, 4012, 8590, 5493, 1369, 128, 1, 1, 9, 984, 19072, 74148, 81445, 29879, 4521, 256, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,5
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LINKS
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FORMULA
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T(1,n)=1, T(2,n)=n, T(n,1)=1, T(n,2)=2^(n-1).
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EXAMPLE
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The start of the sequence as table:
* 1 1 1 1 1 1 1 ...
* 1 2 3 4 5 6 7 ...
* 1 4 11 28 69 168 407 ...
* 1 8 38 178 844 4012 19072 ...
* 1 16 126 1008 8590 74148 638472 ...
* 1 32 415 5493 81445 1246850 19011465 ...
* 1 64 1369 29879 761047 20477490 550254085 ...
* ...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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