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Search: id:A131911
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| 1, 4, 3, 5, 2, 5, 8, 1, 2, 7, 9, 2, 1, 2, 9, 12, 1, 2, 1, 2, 11, 13, 2, 1, 2, 1, 2, 13, 16, 1, 2, 1, 2, 1, 2, 15, 17, 2, 1, 2, 1, 2, 1, 2, 17, 20, 1, 2, 1, 2, 1, 2, 1, 2, 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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Left column, congruent to {0, 1} mod 4, A042948: (1, 4, 5, 8, 9, 12, 13, 16,...). Row sums = A131912: (1, 7, 12, 18, 23, 29, 34,...).
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FORMULA
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2*A131821 - A128174 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, 2, 5;
8, 1, 2, 7;
9, 2, 1, 2, 9;
12, 1, 2, 1, 2, 11;
13, 2, 1, 2, 1, 2, 13;
...
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CROSSREFS
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Cf. A131821, A128174, A042948, A131912.
Sequence in context: A029934 A011397 A081665 this_sequence A011206 A075128 A074091
Adjacent sequences: A131908 A131909 A131910 this_sequence A131912 A131913 A131914
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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), Jul 27 2007
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