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Search: id:A131325
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| 1, 2, 1, 1, 2, 1, 2, 4, 2, 1, 1, 2, 7, 2, 1, 2, 7, 2, 10, 2, 1, 1, 2, 16, 2, 13, 2, 1, 2, 10, 2, 28, 2, 16, 2, 1, 1, 2, 28, 2, 43, 2, 19, 2, 1, 2, 13, 2, 58, 2, 61, 2, 22, 2, 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 = A131326: (1, 3, 4, 9, 13, 24, 37, 63, 100,...).
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FORMULA
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3*A049310 - 2*A000012(signed + - + -...by columns).
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
1, 2, 1;
2, 4, 2, 1;
1, 2, 7, 2, 1;
2, 7, 2, 10, 2, 1;
1, 2, 16, 2, 13, 2, 1;
...
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CROSSREFS
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Cf. A049310, A131324, A131326, A131327.
Sequence in context: A099386 A029306 A116491 this_sequence A049824 A133087 A048996
Adjacent sequences: A131322 A131323 A131324 this_sequence A131326 A131327 A131328
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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), Jun 28 2007
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