Numbers k such that tau(k) - tau(k+1) = 1.

Terms

a(0) =4a(1) =8a(2) =81a(3) =441a(4) =625a(5) =1089a(6) =2024a(7) =2401a(8) =3025a(9) =3968a(10) =5624a(11) =5929a(12) =6561a(13) =6723a(14) =7569a(15) =8281a(16) =8463a(17) =12321a(18) =13225a(19) =13688a(20) =14161a(21) =14641a(22) =14884a(23) =15375a(24) =16641a(25) =20164a(26) =21608a(27) =24025a(28) =25921a(29) =26895