arcsinh(tan(x)*tan(x))=2/2!*x^2+16/4!*x^4+152/6!*x^6-5504/8!*x^8...
A012391
arcsinh(tan(x)*tan(x))=2/2!*x^2+16/4!*x^4+152/6!*x^6-5504/8!*x^8...
Terms
- a(0) =0a(1) =2a(2) =16a(3) =152a(4) =-5504a(5) =-865888a(6) =-49313024a(7) =10192998272
External references
- oeis: A012391