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A186248
2n-th derivative of sec(x)^cos(x) at x=0.
1
1, 1, -1, -44, -211, 9136, 118799, -9894884, -368001271, 3949758496, -1062959453221, -352302017500124, -54987975498787651, -11177493084346370144, -3145848334837840227961, -988952736939184411495964, -349477151478120199840810351, -141758901275895434356815281984
OFFSET
0,4
COMMENTS
sec(x) = 1/cos(x).
The sequence gives only 2n-th derivatives because (2n+1)-th derivatives are 0.
MATHEMATICA
f[x_] := Sec[x]^Cos[x]; Table[Derivative[2*n] [f][0], {n, 0, 18}]
CROSSREFS
Cf. A215677.
Sequence in context: A189547 A026908 A183246 * A215677 A122235 A250454
KEYWORD
sign
AUTHOR
Michel Lagneau, Aug 18 2012
STATUS
approved