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Search: id:A114219
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| A114219 |
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Number triangle (k-(k-1)*0^(n-k))*[k<=n]. |
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+0
4
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| 1, 0, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 2, 3, 1, 0, 1, 2, 3, 4, 1, 0, 1, 2, 3, 4, 5, 1, 0, 1, 2, 3, 4, 5, 6, 1, 0, 1, 2, 3, 4, 5, 6, 7, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1
(list; table; graph; listen)
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OFFSET
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0,9
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COMMENT
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Row sums are n(n-1)/2+1 (essentially A000124). Diagonal sums are A114220. First difference triangle of A077028, when this is viewed as a number triangle.
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FORMULA
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Triangle begins 1; 0, 1; 0, 1, 1; 0, 1, 2, 1; 0, 1, 2, 3, 1; 0, 1, 2, 3, 4, 1; 0, 1, 2, 3, 4, 5, 1; 0, 1, 2, 3, 4, 5, 6, 1; 0, 1, 2, 3, 4, 5, 6, 7, 1;
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CROSSREFS
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Sequence in context: A035670 A058839 A065364 this_sequence A119339 A037835 A116433
Adjacent sequences: A114216 A114217 A114218 this_sequence A114220 A114221 A114222
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Nov 18 2005
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