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Search: id:A128414
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| A128414 |
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Riordan array ((1-2x)/(1+2x),x/(1+2x)^2). |
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+0
4
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| 1, -4, 1, 8, -8, 1, -16, 36, -12, 1, 32, -128, 80, -16, 1, -64, 400, -400, 140, -20, 1, 128, -1152, 1680, -896, 216, -24, 1, -256, 3136, -6272, 4704, -1680, 308, -28, 1, 512, -8192, 21504, -21504, 10560, -2816
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Inverse is A128417. Row sums are A128415. Diagonal sums are A128416.
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EXAMPLE
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Triangle begins
1,
-4, 1,
8, -8, 1,
-16, 36, -12, 1,
32, -128, 80, -16, 1,
-64, 400, -400, 140, -20, 1,
128, -1152, 1680, -896, 216, -24, 1,
-256, 3136, -6272, 4704, -1680, 308, -28, 1,
512, -8192, 21504, -21504, 10560, -2816, 416, -32, 1
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CROSSREFS
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Cf. A128413.
Sequence in context: A103553 A067439 A116924 this_sequence A019699 A125092 A122914
Adjacent sequences: A128411 A128412 A128413 this_sequence A128415 A128416 A128417
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KEYWORD
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easy,sign,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Mar 02 2007
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