Number of factorable subsets of a 1 X n uniform grid.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =3a(5) =8a(6) =20a(7) =45a(8) =89a(9) =174a(10) =323a(11) =590a(12) =1048a(13) =1834a(14) =3135a(15) =5361a(16) =8977a(17) =14993a(18) =24859a(19) =41115a(20) =67329a(21) =110393a(22) =179756a(23) =292449a(24) =473375a(25) =766821a(26) =1237931a(27) =2001784a(28) =3225214a(29) =5198844