G.f. A(x) satisfies A(x) = 1 + x + x*(1 + x)^3*A(x)^2.
A366237
G.f. A(x) satisfies A(x) = 1 + x + x*(1 + x)^3*A(x)^2.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =33a(4) =161a(5) =843a(6) =4601a(7) =25896a(8) =149254a(9) =876480a(10) =5225616a(11) =31547730a(12) =192470212a(13) =1184804588a(14) =7349888208a(15) =45902094845a(16) =288368474907
External references
- oeis: A366237