exp(sec(x)*arctanh(x))=1+x+1/2!*x^2+6/3!*x^3+21/4!*x^4+120/5!*x^5...
A012840
exp(sec(x)*arctanh(x))=1+x+1/2!*x^2+6/3!*x^3+21/4!*x^4+120/5!*x^5...
Terms
- a(0) =1a(1) =1a(2) =1a(3) =6a(4) =21a(5) =120a(6) =765a(7) =5376a(8) =46473a(9) =415104a(10) =4371225a(11) =48143744a(12) =594635613a(13) =7784817664a(14) =110691178325
External references
- oeis: A012840