First differences of A052911.

Terms

a(0) =1a(1) =5a(2) =14a(3) =45a(4) =139a(5) =434a(6) =1351a(7) =4209a(8) =13110a(9) =40837a(10) =127203a(11) =396226a(12) =1234207a(13) =3844441a(14) =11975078a(15) =37301261a(16) =116189979a(17) =361921042a(18) =1127350583a(19) =3511592833a(20) =10938286998a(21) =34071752661a(22) =106130359315a(23) =330586256610