First differences of A219795.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =2a(6) =2a(7) =3a(8) =1a(9) =5a(10) =7a(11) =10a(12) =11a(13) =14a(14) =23a(15) =33a(16) =44a(17) =54a(18) =81a(19) =114a(20) =158a(21) =212a(22) =287a(23) =407a(24) =565a(25) =777a(26) =1050a(27) =1471a(28) =2036a(29) =2813