OFFSET
0,4
FORMULA
a(n) = 2^(2*n-1) * (2^(2*n)-1) * abs(Bernoulli(2*n))/4 - (C(1,n) - C(0,n))/4.
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[(x*Tan[x]-x^2)/8, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, May 06 2014 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 13 2006
EXTENSIONS
More terms from Harvey P. Dale, May 06 2014
STATUS
approved