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Search: id:A078007
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| A078007 |
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Expansion of (1-x)/(1-x-2*x^2-x^3). |
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+0
3
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| 1, 0, 2, 3, 7, 15, 32, 69, 148, 318, 683, 1467, 3151, 6768, 14537, 31224, 67066, 144051, 309407, 664575, 1427440, 3065997, 6585452, 14144886, 30381787, 65257011, 140165471, 301061280, 646649233, 1388937264, 2983297010, 6407820771, 13763352055, 29562290607
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OFFSET
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0,3
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COMMENT
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Let X = the 3x3 matrix [0,1,0; 0,0,1; 1,2,1]. a(n) = center term of X^n; but A002478(n) = term (3,3) of X^n. - Gary W. Adamson (qntmpkt(AT)yahoo.com), May 30 2008
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CROSSREFS
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First differences of A002478.
Sequence in context: A049958 A076993 A076698 this_sequence A001932 A005909 A003006
Adjacent sequences: A078004 A078005 A078006 this_sequence A078008 A078009 A078010
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KEYWORD
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nonn
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AUTHOR
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njas, Nov 17 2002
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