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Search: id:A141290
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| A141290 |
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Triangle read by rows, descending antidiagonals of a (1, 3, 5,...) * (1, 4, 16,...) multiplication table. |
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+0
4
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| 1, 3, 4, 5, 12, 16, 7, 20, 48, 64, 9, 28, 80, 112, 256, 11, 36, 112, 320, 768, 1024, 13, 44, 144, 448, 1280, 3072, 4096, 15, 52, 176, 576, 1792, 5120, 12288, 6384, 17, 60, 208, 704, 2304, 7168, 20480, 49152, 65536, 19, 68, 240, 832, 2816, 9216, 28672, 81920
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Binary representation of all terms ends in an even number of zeros (Cf. A003159).
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FORMULA
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Triangle read by rows, descending antidiagonals of a (1, 3, 5,...) * (1, 4, 16,...) multiplication table.
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EXAMPLE
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Given the multiplication table (1, 3, 5,...) * (1, 4, 16,...); i.e. odd numbers as column headings, powers of 4 along the left border:
1,.....3,....5,....7,...
4,....12,...20,...28,...
16,...48,...80,..112,...
64,..112,..320,..448,...
...
Rows of the triangle = descending antidiagonals of the array, getting:
1;
3, 4;
5, 12, 16;
7, 20, 48, 64;
9, 28, 80, 112, 256;
11, 36, 112, 320, 768, 1024;
13, 44, 144, 448, 1280, 3072, 4096;
15, 52, 176, 576, 1792, 5120, 122288, 16384;
...
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CROSSREFS
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Cf. A003159, A141291.
Sequence in context: A077034 A076601 A090829 this_sequence A010752 A049929 A060738
Adjacent sequences: A141287 A141288 A141289 this_sequence A141291 A141292 A141293
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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 22 2008
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