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Search: id:A130026
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| A130026 |
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Triangle (n,k) by columns, arithmetic sequences interspersed with k zeros. |
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+0
2
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| 1, 2, 1, 3, 0, 1, 4, 3, 0, 1, 5, 0, 0, 0, 1, 6, 5, 4, 0, 0, 1, 7, 0, 0, 0, 0, 0, 1, 8, 7, 0, 5, 0, 0, 0, 1, 9, 0, 7, 0, 0, 0, 0, 0, 1, 10, 9, 0, 0, 6, 0, 0, 0, 0, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums = A081307: (1, 3, 4, 8, 6, 16, 8, 21, 17,...).
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FORMULA
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Arithmetic sequences by columns, (1,2,3,...); (1,3,5,...); (1,4,7,...); interspersed with k zeros, k=0,1,2,...
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
3, 0, 1;
4, 3, 0, 1;
5, 0, 0, 0, 1;
6, 5, 4, 0, 0, 1;
7, 0, 0, 0, 0, 0, 1;
...
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CROSSREFS
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Cf. A081307, A130027.
Sequence in context: A071490 A127094 A126988 this_sequence A113287 A096798 A137587
Adjacent sequences: A130023 A130024 A130025 this_sequence A130027 A130028 A130029
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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), May 02 2007
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