Deficient oblong numbers.

Terms

a(0) =2a(1) =110a(2) =182a(3) =506a(4) =1406a(5) =1892a(6) =2162a(7) =2756a(8) =3422a(9) =3782a(10) =4556a(11) =5402a(12) =6806a(13) =7310a(14) =8930a(15) =9506a(16) =11342a(17) =11990a(18) =14042a(19) =14762a(20) =17030a(21) =17822a(22) =18632a(23) =20306a(24) =21170a(25) =22052a(26) =22952a(27) =24806a(28) =26732a(29) =27722