First differences of A035409.

Terms

a(0) =21a(1) =3a(2) =4a(3) =8a(4) =105a(5) =5a(6) =31a(7) =5a(8) =11a(9) =9a(10) =5a(11) =44a(12) =3a(13) =9a(14) =423a(15) =5a(16) =36a(17) =12a(18) =5a(19) =5a(20) =16a(21) =3a(22) =116a(23) =7a(24) =13a(25) =9a(26) =9a(27) =5a(28) =54a(29) =16