OFFSET
3,1
FORMULA
a(n) = (2n-1)!/((n-1)(n-2)). - R. J. Mathar, Apr 30 2008
Sum_{n=3..oo} 1/a(n) = (3*cosh(1) + 10*sinh(1) - 6*e)/4 = 0.0178907175323686230239526350278045532... . - Stefano Spezia, Jul 27 2024
MATHEMATICA
Table[(2 n - 1)!/((n - 1)(n - 2)), {n, 3, 20}] - R. J. Mathar, Apr 30 2008
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 02 2008
EXTENSIONS
Edited and corrected by R. J. Mathar, Apr 30 2008
STATUS
approved