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Search: id:A135830
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| 1, 0, 1, 2, 0, 1, 1, 3, 0, 1, 4, 1, 4, 0, 1, 4, 7, 1, 5, 0, 1, 9, 5, 11, 1, 6, 0, 1, 12, 16, 6, 16, 1, 7, 0, 1, 22, 17, 27, 7, 22, 1, 8, 0, 1, 33, 38, 23, 43, 8, 29, 1, 9, 0, 1
(list; table; graph; listen)
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OFFSET
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1,4
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COMMENT
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Row sums A010049: (1, 1, 3, 5, 10, 18, 33,...). A135831 = A000012 * A000012(signed) * A049310
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FORMULA
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A000012(signed) * A049310 * A000012, as infinite lower triangular matrices, where A000012(signed) = (1; -1,1; 1,-1,1;...).
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EXAMPLE
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First few rows of the triangle are:
1;
0, 1;
2, 0, 1;
1, 3, 0, 1;
4, 1, 4, 0, 1;
4, 7, 1, 5, 0, 1;
9, 5, 11, 1, 6, 0, 1;
12, 16, 6, 16, 1, 7, 0, 1;
...
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CROSSREFS
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Cf. A049310, A010049, A135831.
Adjacent sequences: A135827 A135828 A135829 this_sequence A135831 A135832 A135833
Sequence in context: A078879 A082859 A083537 this_sequence A029353 A064922 A079685
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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), Nov 30 2007
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