sech(tan(x)+sin(x))=1-4/2!*x^2+72/4!*x^4-3318/6!*x^6+283640/8!*x^8...
A012947
sech(tan(x)+sin(x))=1-4/2!*x^2+72/4!*x^4-3318/6!*x^6+283640/8!*x^8...
Terms
- a(0) =1a(1) =-4a(2) =72a(3) =-3318a(4) =283640a(5) =-38913946a(6) =7833273228
External references
- oeis: A012947