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A024290
Expansion of tan(tan(x)^2)/2.
0
0, 1, 8, 256, 17408, 1910656, 309060608, 69341479936, 20585851486208, 7805361597546496, 3678560956503031808, 2108887897093614862336, 1444987869648059585527808, 1166088560957891800314413056
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..13.
MATHEMATICA
Tan[ Tan[ x ]^2 ]/2 (* Even Part *)
CROSSREFS
A009710
.
Sequence in context:
A128787
A013824
A010044
*
A253165
A140338
A140339
Adjacent sequences:
A024287
A024288
A024289
*
A024291
A024292
A024293
KEYWORD
nonn
AUTHOR
R. H. Hardin
STATUS
approved
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Last modified May 21 16:27 EDT 2024. Contains 372738 sequences. (Running on oeis4.)
