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Search: id:A159855
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| A159855 |
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Riordan array ((1-2*x-x^2)/(1-x),x/(1-x)). |
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+0
1
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| 1, -1, 1, -2, 0, 1, -2, -2, 1, 1, -2, -4, -1, 2, 1, -2, -6, -5, 1, 3, 1, -2, -8, -11, -4, 4, 4, 1, -2, -10, -19, -15, 0, 8, 5, 1, -2, -12, -29, -34, -15, 8, 13, 6, 1, -2, -14, -41, -63, -49, -7, 21, 19, 7, 1, -2, -16, -55, -104, -112, -56, 14, 34, 20, 8, 1
(list; table; graph; listen)
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OFFSET
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0,4
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EXAMPLE
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Triangle begins : 1 ; -1,1 ; -2,0,1 ; -2,-2,1,1 ; -2,-4,-1,2,1 ; -2,-6,-5,1,3,1 ; ...
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CROSSREFS
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Sequence in context: A145462 A159934 A067460 this_sequence A128256 A065051 A084665
Adjacent sequences: A159852 A159853 A159854 this_sequence A159856 A159857 A159858
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KEYWORD
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easy,sign,tabl
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AUTHOR
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Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Apr 24 2009
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