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Search: id:A131782
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| 1, 5, 1, 11, 5, 1, 19, 11, 5, 1, 29, 19, 11, 5, 1, 41, 29, 19, 11, 5, 1, 55, 41, 29, 19, 11, 5, 1, 71, 55, 41, 29, 19, 11, 5, 1, 89, 71, 55, 41, 19, 19, 11, 5, 1, 109, 89, 71, 55, 41, 29, 19, 11, 5, 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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Row sums = A084990 starting (1, 6, 17, 36, 65, 106,...).
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FORMULA
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(A004736 * A000012) - (A000012 * A004736) - A000012; as infinite lower triangular matrices. n-th row = n descending terms of A028387: (1, 5, 11, 19, 29, 41, 55,...). By columns, each column = A028387: (1, 5, 11, 19, 29,...).
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EXAMPLE
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First few rows of the triangle are:
1;
5, 1;
11, 5, 1;
19, 11, 5, 1;
29, 19, 11, 5, 1;
41, 29, 19, 11, 5, 1;
55, 41, 29, 19, 11, 5, 1;
...
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CROSSREFS
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Cf. A028387, A084990, A004736, A000012.
Sequence in context: A112830 A062967 A067292 this_sequence A075677 A051853 A147414
Adjacent sequences: A131779 A131780 A131781 this_sequence A131783 A131784 A131785
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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 14 2007
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