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0, 1, 1, 2, 4, 7, 9, 12, 14, 17, 19, 22, 26, 31, 35, 40, 46, 53, 59, 66, 74, 83, 91, 100, 108, 117, 125, 134, 144, 155, 165, 176, 186, 197, 207, 218, 230, 243, 255, 268, 280, 293, 305, 318, 332, 347, 361, 376, 392, 409, 425, 442, 460, 479, 497, 516, 534, 553, 571
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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REFERENCES
| J.-P. Allouche and J. Shallit, The ring of k-regular sequences, II, Theoret. Computer Sci., 307 (2003), 3-29.
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LINKS
| J.-P. Allouche, J. Shallit, The Ring of k-regular Sequences, II
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FORMULA
| a(0)=0, a(2n+1) = -a(n)-a(n+1)+n^2+n, a(2n+1) = -2a_n+n^2+2n+1. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Oct 16 2003
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CROSSREFS
| Sequence in context: A067839 A047211 A189677 * A065027 A165994 A163293
Adjacent sequences: A087730 A087731 A087732 * A087734 A087735 A087736
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 01 2003
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EXTENSIONS
| More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 04 2003
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