First differences of A073708.

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =10a(5) =10a(6) =22a(7) =22a(8) =57a(9) =57a(10) =115a(11) =115a(12) =248a(13) =248a(14) =456a(15) =456a(16) =906a(17) =906a(18) =1598a(19) =1598a(20) =2956a(21) =2956a(22) =4980a(23) =4980a(24) =8802a(25) =8802a(26) =14422a(27) =14422a(28) =24440a(29) =24440