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Search: id:A077941
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| A077941 |
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Expansion of 1/(1-2*x+x^2+x^3). |
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+0
3
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| 1, 2, 3, 3, 1, -4, -12, -21, -26, -19, 9, 63, 136, 200, 201, 66, -269, -805, -1407, -1740, -1268, 611, 4230, 9117, 13393, 13439, 4368, -18096, -53999, -94270, -116445, -84621, 41473, 284012, 611172, 896859, 898534, 289037, -1217319, -3622209, -6316136, -7792744, -5647143, 2814594
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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With three leading zeros, is the inverse binomial transform of A077868, with three leading zeros. - Paul Barry (pbarry(AT)wit.ie), Oct 22 2004
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FORMULA
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a(n)=sum{k=0..n+3, C(n+3, k)(-1)^(n+3-k)*sum{j=0..floor((k-2)/2), C(k-2-2j, j+1)}}. - Paul Barry (pbarry(AT)wit.ie), Oct 22 2004
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CROSSREFS
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Cf. A077990.
Adjacent sequences: A077938 A077939 A077940 this_sequence A077942 A077943 A077944
Sequence in context: A114104 A076780 A089283 this_sequence A077990 A085667 A035516
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KEYWORD
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sign
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AUTHOR
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njas, Nov 17 2002
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