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Search: id:A131873
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| 1, 8, 4, 15, 8, 7, 22, 12, 11, 10, 29, 16, 15, 14, 13, 36, 20, 19, 18, 17, 16, 43, 24, 23, 22, 21, 20, 19, 50, 28, 27, 26, 25, 24, 23, 22, 57, 32, 31, 30, 29, 28, 27, 26, 25, 64, 36, 35, 34, 33, 32, 31, 30, 29, 28
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Left column = A016993, 7n + 1: (1, 8, 15, 22, 29,...). Right border = 3n + 1: (1, 4, 7, 10, 13,...). Row sums = A131874: (1, 12, 30, 55,...).
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FORMULA
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A131844 * A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
8, 4;
15, 8, 7;
22, 12, 11, 10;
29, 16, 15, 14, 13;
36, 20, 19, 18, 17, 16;
43, 24, 23, 22, 21, 20, 19;
...
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CROSSREFS
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Cf. A131844, A131874, A016993, A131875.
Sequence in context: A011196 A105144 A082073 this_sequence A040059 A018810 A070485
Adjacent sequences: A131870 A131871 A131872 this_sequence A131874 A131875 A131876
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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 22 2007
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