Primes in ternary.
2, 10, 12, 21, 102, 111, 122, 201, 212, 1002, 1011, 1101, 1112, 1121, 1202, 1222
1 seqfan posts
Wed Jun 2 11:05:11 CEST 2010 [seqfan] Working in base 2, 3, k, replace n by the concatenation of its prime divisors in decreasing/increasing order (write answer in base 10) with or without multiplicity