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Search: id:A135838
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| A135838 |
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M * A007318, M = a triangle with (1, 2, 2, 4, 4, 8, 8, 16, 16,...) in the main diagonal and the rest zeros. |
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+0
3
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| 1, 2, 2, 2, 4, 2, 4, 12, 12, 4, 4, 16, 24, 16, 4, 8, 40, 80, 80, 40, 8, 8, 48, 120, 160, 120, 48, 8, 16, 112, 336, 560, 560, 336, 112, 16, 16, 128, 448, 896, 1120, 896, 448, 128, 16, 32, 288, 1152, 2688, 4032, 4032, 2688, 1152, 288, 32
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A094015: (1, 4, 8, 32, 64, 256,...)
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FORMULA
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M * Pascal's triangle as infinite lower triangular matrices, where M = a triangle with (1, 2, 2, 4, 4, 8, 8, 16, 16,...) in the main diagonal and the rest zeros.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
2, 4, 2;
4, 12, 12, 4;
4, 16, 24, 16, 4;
8, 40, 80, 80, 40, 8;
...
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CROSSREFS
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Cf. A094015, A135837.
Sequence in context: A105681 A130127 A098069 this_sequence A114349 A086087 A133265
Adjacent sequences: A135835 A135836 A135837 this_sequence A135839 A135840 A135841
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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), Dec 01 2007
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