Almost anti-perfect numbers.

Terms

a(0) =3a(1) =4a(2) =9a(3) =19a(4) =24a(5) =131a(6) =139a(7) =339a(8) =5881a(9) =14849a(10) =29501a(11) =57169a(12) =63061a(13) =65789a(14) =542781a(15) =2439241a(16) =3197249a(17) =4111561a(18) =8614481a(19) =48657789a(20) =218234169a(21) =309296261a(22) =731499089a(23) =1191549689a(24) =1569571661a(25) =2471800109a(26) =5687426561a(27) =9505043161a(28) =67784277581a(29) =79468538969