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Search: id:A131876
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| 1, 15, 7, 29, 15, 13, 43, 23, 21, 19, 57, 31, 29, 27, 25, 71, 39, 37, 35, 33, 31, 85, 47, 45, 43, 41, 39, 37, 99, 55, 53, 51, 49, 47, 45, 43, 113, 63, 61, 59, 57, 55, 53, 51, 49, 127, 71, 69, 67, 65, 63, 61, 59, 57, 55
(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 = 14n + 1, A131877: (1, 15, 29, 43, 57, 21,...). Right border = 6n + 1, A016921: (1, 7, 13, 19,...). Row sums = A131878 (1, 22, 57, 106, 169,...).
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FORMULA
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2*A131873 - A000012 as infinite lower triangular matrices.
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EXAMPLE
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First few rows of the triangle are:
1;
15, 7;
29, 15, 13;
43, 23, 21, 19;
57, 31, 29, 27, 25;
71, 39, 37, 35, 33, 31;
85, 47, 45, 43, 41, 39, 37;
...
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CROSSREFS
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Cf. A131877, A131878, A131873.
Sequence in context: A097532 A033335 A133817 this_sequence A126070 A103241 A094501
Adjacent sequences: A131873 A131874 A131875 this_sequence A131877 A131878 A131879
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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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