First differences of A160644.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =3a(6) =4a(7) =8a(8) =10a(9) =13a(10) =22a(11) =28a(12) =39a(13) =58a(14) =77a(15) =104a(16) =148a(17) =197a(18) =265a(19) =363a(20) =481a(21) =638a(22) =858a(23) =1126a(24) =1480a(25) =1953a(26) =2544a(27) =3309a(28) =4312a(29) =5566