Partial sums of A048654.

Terms

a(0) =1a(1) =5a(2) =14a(3) =36a(4) =89a(5) =217a(6) =526a(7) =1272a(8) =3073a(9) =7421a(10) =17918a(11) =43260a(12) =104441a(13) =252145a(14) =608734a(15) =1469616a(16) =3547969a(17) =8565557a(18) =20679086a(19) =49923732a(20) =120526553a(21) =290976841a(22) =702480238a(23) =1695937320a(24) =4094354881a(25) =9884647085a(26) =23863649054a(27) =57611945196a(28) =139087539449a(29) =335787024097