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Search: id:A161985
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| A161985 |
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Table read by rows: the number 2n+1 followed by the numbers n+1 to 3n+1. |
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+0
1
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| 1, 1, 3, 2, 3, 4, 5, 3, 4, 5, 6, 7, 7, 4, 5, 6, 7, 8, 9, 10, 9, 5, 6, 7, 8, 9, 10, 11, 12, 13, 11, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 13, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 15, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 16, 9, 10, 11, 12, 13, 14, 15, 16, 17
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Row sums are 2(n+1)(2n+1). Row sums discarding the first column are (2n+1)^2,
that is the square of the element in the first column.
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EXAMPLE
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The table with rows starting at n=0 is
1,1;
3,2,3,4;
5,3,4,5,6,7;
7,4,5,6,7,8,9,10;
9,5,6,7,8,9,10,11,12,13;
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CROSSREFS
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Cf. A000027, A000290.
Sequence in context: A055923 A035634 A091563 this_sequence A035366 A114751 A132408
Adjacent sequences: A161982 A161983 A161984 this_sequence A161986 A161987 A161988
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KEYWORD
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nonn,tabf,less
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 23 2009
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 28 2009
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