Numbers k such that k and k+1 are both refactorable numbers.

Terms

a(0) =1a(1) =8a(2) =1520a(3) =50624a(4) =62000a(5) =103040a(6) =199808a(7) =221840a(8) =269360a(9) =463760a(10) =690560a(11) =848240a(12) =986048a(13) =1252160a(14) =1418480a(15) =2169728a(16) =2692880a(17) =2792240a(18) =3448448a(19) =3721040a(20) =3932288a(21) =5574320a(22) =5716880a(23) =6066368a(24) =6890624a(25) =6922160a(26) =8485568