Numbers k such that k and k+1 have the same number of divisors.

Terms

a(0) =2a(1) =14a(2) =21a(3) =26a(4) =33a(5) =34a(6) =38a(7) =44a(8) =57a(9) =75a(10) =85a(11) =86a(12) =93a(13) =94a(14) =98a(15) =104a(16) =116a(17) =118a(18) =122a(19) =133a(20) =135a(21) =141a(22) =142a(23) =145a(24) =147a(25) =158a(26) =171a(27) =177a(28) =189a(29) =201