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Search: id:A133981
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| 1, 4, 3, 5, 6, 5, 6, 7, 8, 7, 7, 8, 9, 10, 9, 8, 9, 10, 11, 12, 11, 9, 10, 11, 12, 23, 14, 13, 10, 11, 12, 13, 14, 15, 16, 15, 11, 12, 13, 14, 15, 16, 17, 18, 17, 12, 13, 14, 15, 16, 17, 18, 19, 20, 19
(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 = A133694: (1, 7, 16, 28, 43, 61,...).
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FORMULA
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(A000012 * A127701 + A127701 * A000012) - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
4, 3;
5, 6, 5;
6, 7, 8, 7;
7, 8, 9, 10, 9;
8, 9, 10, 11, 12, 11;
9, 10, 11, 12, 13, 14, 13;
10, 11, 12, 13, 14, 15, 16, 15;
11, 12, 13, 14, 15, 16, 17, 18, 17;
...
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CROSSREFS
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Cf. A000012, A133694, A127701.
Adjacent sequences: A133978 A133979 A133980 this_sequence A133982 A133983 A133984
Sequence in context: A024688 A024477 A049008 this_sequence A016701 A023829 A000211
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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), Sep 30 2007
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