G.f.: A(x) = Sum_{n>=0} x^n*(A(n*x) + A(-n*x))/2.
A196196
G.f.: A(x) = Sum_{n>=0} x^n*(A(n*x) + A(-n*x))/2.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =15a(6) =97a(7) =528a(8) =7525a(9) =81413a(10) =2330257a(11) =53229494a(12) =2883887781a(13) =143434131379
External references
- oeis: A196196