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Search: id:A130313
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| 1, 2, 1, 4, 1, 1, 6, 2, 1, 1, 10, 2, 1, 1, 1, 12, 4, 2, 1, 1, 1, 18, 4, 2, 1, 1, 1, 1, 22, 6, 2, 2, 1, 1, 1, 1, 28, 6, 4, 2, 1, 1, 1, 1, 1, 32, 10, 4, 2, 2, 1, 1, 1, 1, 1
(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 = the triangular series, A000217: (1, 3, 6, 10,...). Left column = A002088: (1, 2, 4, 6, 10, 12, 18,...).
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FORMULA
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A000012 * A054523 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 1;
4, 1, 1;
6, 2, 1, 1;
10, 2, 1, 1, 1;
12, 4, 2, 1, 1, 1;
18, 4, 2, 1, 1, 1, 1;
...
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CROSSREFS
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Cf. A000012, A054523, A000217.
Sequence in context: A131035 A118745 A131034 this_sequence A124428 A124845 A127625
Adjacent sequences: A130310 A130311 A130312 this_sequence A130314 A130315 A130316
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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), May 21 2007
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