290649

Appears in sequences

• Expansion of e.g.f.: exp(sec(x)-exp(x))=1-x+1/2!*x^2-2/3!*x^3+9/4!*x^4-32/5!*x^5...at n=10A013501
• a(n) = (1/2)*A291036(n).at n=12A291037