Concatenate n and number of divisors of n.

Terms

a(0) =11a(1) =22a(2) =32a(3) =43a(4) =52a(5) =64a(6) =72a(7) =84a(8) =93a(9) =104a(10) =112a(11) =126a(12) =132a(13) =144a(14) =154a(15) =165a(16) =172a(17) =186a(18) =192a(19) =206a(20) =214a(21) =224a(22) =232a(23) =248a(24) =253a(25) =264a(26) =274a(27) =286a(28) =292a(29) =308