First differences of A035424.

Terms

a(0) =2a(1) =2a(2) =3a(3) =5a(4) =7a(5) =4a(6) =7a(7) =4a(8) =11a(9) =4a(10) =3a(11) =15a(12) =4a(13) =3a(14) =23a(15) =4a(16) =3a(17) =5a(18) =30a(19) =4a(20) =3a(21) =5a(22) =44a(23) =4a(24) =3a(25) =5a(26) =7a(27) =24a(28) =34a(29) =4