Numbers k such that k | A057643(k) and (k+1) | A057643(k+1).

Terms

a(0) =1a(1) =799799a(2) =1204280a(3) =2460975a(4) =3382379a(5) =6116175a(6) =7050120a(7) =8070699a(8) =13339424a(9) =20966049a(10) =28460600a(11) =41265680a(12) =41463135a(13) =52404624a(14) =66108399a(15) =68919080a(16) =72946224a(17) =81102944a(18) =84479680a(19) =102971924a(20) =106663304a(21) =110791736a(22) =112375899a(23) =115225439a(24) =118333215a(25) =131115984a(26) =132073424