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Search: id:A131230
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| 1, 4, 1, 5, 2, 1, 8, 1, 2, 1, 9, 2, 1, 2, 1, 12, 1, 2, 1, 2, 1, 13, 2, 1, 2, 1, 2, 1, 16, 1, 2, 1, 2, 1, 2, 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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Left column = A042948, numbers congruent to {1,0} mod 4: (1, 4, 5, 8, 9, 12,...). Row sums = A047383, numbers congruent to {1,5} mod 7: (1, 5, 8, 12, 15,...).
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FORMULA
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2*A130196 - A128174 as infinite lower triangular matrices., where A130196 = (1; 2,1; 3,2,1;...)
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EXAMPLE
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First few rows of the triangle are:
1;
4, 1;
5, 2, 1;
8, 1, 2, 1;
9, 2, 1, 2, 1;
12, 1, 2, 1, 2, 1;
...
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CROSSREFS
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Cf. A047383, A042948, A042948, A035608, A130296, A128174, A131231.
Sequence in context: A086300 A028271 A029666 this_sequence A076063 A035590 A080414
Adjacent sequences: A131227 A131228 A131229 this_sequence A131231 A131232 A131233
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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 20 2007
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