G.f. satisfies A(x) = 1 + x*A(x)^3 * (1 + x*A(x))^3.
A367260
G.f. satisfies A(x) = 1 + x*A(x)^3 * (1 + x*A(x))^3.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =36a(4) =251a(5) =1881a(6) =14817a(7) =120950a(8) =1014042a(9) =8680377a(10) =75552553a(11) =666614637a(12) =5948817600a(13) =53599239101a(14) =486926148000
External references
- oeis: A367260