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Search: id:A131437
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| 1, 3, 5, 7, 9, 13, 15, 17, 21, 19, 31, 33, 37, 45, 61, 63, 65, 69, 77, 93, 125, 127, 129, 133, 141, 157, 189, 253, 255, 257, 261, 269, 285, 317, 381, 509, 511, 513, 517, 525, 541, 573, 637, 765, 1021, 1023, 1025, 1029, 1037, 1053, 1085, 1149, 1277, 1533, 2045
(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 = 2^n - 1; right border = A036563, 2^(n+1) - 3: (1, 5, 13, 29, 61, 125,...). Row sums = A131438: (1, 8, 29, 82, 207, 492, 1129,...).
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FORMULA
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(A000012 * A131436) + (A131436 * A000012) - A000012; as infinite lower triangular matrices.
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EXAMPLE
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Frist few rows of the triangle are:
1;
3, 5;
7, 9, 13;
15, 17, 21, 19;
31, 33, 37, 45, 61;
63, 65, 69, 77, 93, 125;
...
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CROSSREFS
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Cf. A036563, A131436, A131438, A131439.
Sequence in context: A064608 A024893 A119253 this_sequence A063951 A003553 A003532
Adjacent sequences: A131434 A131435 A131436 this_sequence A131438 A131439 A131440
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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 11 2007
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