Numbers k such that both k and k+1 are nonunitary abundant numbers (A064597).

Terms

a(0) =165375a(1) =893024a(2) =1047375a(3) =1576575a(4) =2282175a(5) =2304224a(6) =2858624a(7) =3614624a(8) =4068224a(9) =4096575a(10) =4597424a(11) =4975424a(12) =6591375a(13) =7574175a(14) =8555624a(15) =9511424a(16) =10446975a(17) =10749375a(18) =10872224a(19) =11477024a(20) =12535424a(21) =13773375a(22) =13946624a(23) =14277375a(24) =15926624a(25) =16041375a(26) =16505775a(27) =16769024