First differences of A035423.

Terms

a(0) =4a(1) =3a(2) =5a(3) =7a(4) =11a(5) =15a(6) =7a(7) =15a(8) =7a(9) =23a(10) =7a(11) =5a(12) =30a(13) =7a(14) =5a(15) =44a(16) =7a(17) =5a(18) =7a(19) =58a(20) =7a(21) =5a(22) =7a(23) =82a(24) =7a(25) =5a(26) =7a(27) =11a(28) =105a(29) =7