130280

Appears in sequences

• sec(arcsinh(x)+arctan(x))=1+4/2!*x^2+56/4!*x^4+1990/6!*x^6...at n=4A013113
• Number of subsets of {1,2,...,n} such that every number in the set is no larger than the sum of the other numbers in the set.at n=16A095941