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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
OFFSET
0,3
MATHEMATICA
Tan[ Tan[ x ]^2 ]/2 (* Even Part *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved