First differences of A024431.

Terms

a(0) =1a(1) =4a(2) =2a(3) =10a(4) =3a(5) =23a(6) =8a(7) =54a(8) =9a(9) =117a(10) =11a(11) =245a(12) =14a(13) =504a(14) =18a(15) =1026a(16) =21a(17) =2073a(18) =22a(19) =4168a(20) =24a(21) =8360a(22) =25a(23) =16745a(24) =27a(25) =33517a(26) =28a(27) =67062a(28) =29a(29) =134153