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Search: id:A157031
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| A157031 |
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Triangle A054521 * A157019, where A054521 = an infinite lower triangular matrix and A157027 = a vector [1, 2, 2, 4, 2, 8, 2, 10, 8,...] |
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+0
1
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| 1, 1, 3, 3, 9, 3, 19, 7, 21, 13, 51, 7, 87, 17
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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a(4) = 3 = (1, 0, 1, 0) dot (1, 2, 2, 4) = (1 + 0 + 2 + 0), where (1, 0, 1, 0) equals row 4 of triangle A054521
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CROSSREFS
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Cf. A157019, A054521
Sequence in context: A036553 A166466 A068219 this_sequence A113213 A088032 A066572
Adjacent sequences: A157028 A157029 A157030 this_sequence A157032 A157033 A157034
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson & Mats Granvik (qntmpkt(AT)yahoo.com), Feb 21 2009
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