Product_{n>=1} (1 + a(n)*x^n/n!) = 1 + arctan(x).
A353820
Product_{n>=1} (1 + a(n)*x^n/n!) = 1 + arctan(x).
Terms
- a(0) =1a(1) =0a(2) =-2a(3) =8a(4) =-16a(5) =96a(6) =-832a(7) =9344a(8) =-27648a(9) =238080a(10) =-4228608a(11) =55812096a(12) =-398991360a(13) =4930609152a(14) =-98606039040
External references
- oeis: A353820