Replace n with the concatenation of its anti-divisors.

Terms

a(0) =2a(1) =3a(2) =23a(3) =4a(4) =235a(5) =35a(6) =26a(7) =347a(8) =237a(9) =58a(10) =2359a(11) =349a(12) =2610a(13) =311a(14) =235711a(15) =45712a(16) =2313a(17) =3813a(18) =2614a(19) =345915a(20) =235915a(21) =716a(22) =2371017a(23) =3417a(24) =2561118a(25) =3581119a(26) =2319a(27) =41220a(28) =237921a(29) =35791321