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Search: id:A127773
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| A127773 |
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Triangle read by rows: row n consists of n-1 zeros followed by n(n+1)/2. |
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+0
11
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| 1, 0, 3, 0, 0, 6, 0, 0, 0, 10, 0, 0, 0, 0, 15, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0, 0, 0, 28, 0, 0, 0, 0, 0, 0, 0, 36
(list; table; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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First few rows of the triangle are:
1;
0, 3;
0, 0, 6;
0, 0, 0, 10;
0, 0, 0, 0, 15;
...
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CROSSREFS
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Cf. A127648, A000217, A127774.
Sequence in context: A072736 A135090 A051174 this_sequence A062688 A067181 A061480
Adjacent sequences: A127770 A127771 A127772 this_sequence A127774 A127775 A127776
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 28 2007
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