O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2*k-1)*arctan(x) ).
A295758
O.g.f.: Sum_{n>=0} Product_{k=1..n} tan( (2*k-1)*arctan(x) ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =113a(5) =1105a(6) =13219a(7) =187103a(8) =3058113a(9) =56675297a(10) =1174295267a(11) =26898243439a(12) =674916701169
External references
- oeis: A295758