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A034877
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Rows of (Pascal's triangle - Losanitsch's triangle) (n >= 0, k >= 0).
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5
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1, 1, 1, 2, 2, 2, 2, 4, 4, 2, 3, 6, 10, 6, 3, 3, 9, 16, 16, 9, 3, 4, 12, 28, 32, 28, 12, 4, 4, 16, 40, 60, 60, 40, 16, 4, 5, 20, 60, 100, 126, 100, 60, 20, 5, 5, 25, 80, 160, 226, 226, 160, 80, 25, 5, 6, 30, 110, 240, 396, 452, 396, 240, 110, 30, 6, 6, 36, 140, 350, 636, 848
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table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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COMMENTS
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Same as A034852, but omitting the border of 0's.
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REFERENCES
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S. M. Losanitsch, Die Isomerie-Arten bei den Homologen der Paraffin-Reihe, Chem. Ber. 30 (1897), 1917-1926.
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LINKS
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EXAMPLE
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Triangle begins:
1;
1, 1;
2, 2, 2;
2, 4, 4, 2;
3, 6, 10, 6, 3;
3, 9, 16, 16, 9, 3;
...
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PROG
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(Haskell)
a034877 n k = a034877_tabl !! n !! k
a034877_row n = a034877_tabl !! n
a034877_tabl = map (init . tail) $ drop 2 a034852_tabl
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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