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1, -1, 4, -1, 1, 9, -1, 1, 5, 16, -1, 1, 5, 11, 25, -1, 1, 5, 11, 19, 36, -1, 1, 5, 11, 19, 29, 49, -1, 1, 5, 11, 19, 29, 41, 64, -1, 1, 5, 11, 19, 29, 41, 55, 81, -1, 1, 5, 11, 19, 29, 41, 55, 71, 100
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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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Deleting the right and left borders gives terms of A028387: (1, 5, 11, 29, 29, 41, 55, 71, ...). Row sums = A064999: (1, 3, 9, 21, 41, ...).
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LINKS
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FORMULA
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EXAMPLE
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First few rows of the triangle:
1;
-1, 4;
-1, 1, 9;
-1, 1, 5, 16;
-1, 1, 5, 11, 25;
-1, 1, 5, 11, 19, 36;
-1, 1, 5, 11, 19, 29, 49;
...
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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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