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1, 0, 3, 1, 0, 5, 0, 3, 0, 7, 1, 0, 5, 0, 9, 0, 3, 0, 7, 0, 11, 1, 0, 5, 0, 9, 0, 13, 0, 3, 0, 7, 0, 11, 0, 15, 1, 0, 5, 0, 9, 0, 13, 0, 17, 0, 3, 0, 7, 0, 11, 0, 15, 0, 19, 1, 0, 5, 0, 9, 0, 13, 0, 17, 0, 21, 0, 3, 0, 7, 0, 11, 0, 15, 0, 19, 0, 23
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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Row sums are the triangular numbers 1, 3, 6, 10, 15, 21, 28, ...; see A000217.
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LINKS
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FORMULA
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A128174 * A127775 as infinite lower triangular matrices. Triangle by columns: (2k-1, 0, 2k-1, 0, ...) in k-th column.
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EXAMPLE
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Triangle begins:
1;
0, 3;
1, 0, 5;
0, 3, 0, 7;
1, 0, 5, 0, 9;
0, 3, 0, 7, 0, 11;
1, 0, 5, 0, 9, 0, 13; ...
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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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