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A117442
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Number triangle related to exp(x)/(cos(x)+sin(x)).
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2
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1, -1, 1, 3, -2, 1, -11, 9, -3, 1, 57, -44, 18, -4, 1, -361, 285, -110, 30, -5, 1, 2763, -2166, 855, -220, 45, -6, 1, -24611, 19341, -7581, 1995, -385, 63, -7, 1, 250737, -196888, 77364, -20216, 3990, -616, 84, -8, 1, -2873041, 2256633, -885996, 232092, -45486, 7182, -924, 108, -9, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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FORMULA
| Column k has e.g.f. (x^k/k!)/(cos(x)+sin(x))
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EXAMPLE
| Triangle begins
1,
-1, 1,
3, -2, 1,
-11, 9, -3, 1,
57, -44, 18, -4, 1,
-361, 285, -110, 30, -5, 1,
2763, -2166, 855, -220, 45, -6, 1,
-24611, 19341, -7581, 1995, -385, 63, -7, 1
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MAPLE
| Row sums are A117443. First column is (-1)^n*A001586(n). Inverse of A117440.
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CROSSREFS
| Sequence in context: A115080 A104219 A123513 * A184182 A118435 A115085
Adjacent sequences: A117439 A117440 A117441 * A117443 A117444 A117445
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KEYWORD
| easy,sign,tabl
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Mar 16 2006
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