G.f. A(x) satisfies A(x) = ( 1 + x/(1 - x*A(x)^(3/4)) )^4.

Terms

a(0) =1a(1) =4a(2) =10a(3) =32a(4) =119a(5) =468a(6) =1934a(7) =8256a(8) =36135a(9) =161276a(10) =731158a(11) =3357748a(12) =15587004a(13) =73021200a(14) =344786056a(15) =1639145180a(16) =7839483967a(17) =37692820908a(18) =182087119582a(19) =883358016328