123354

Appears in sequences

• Vampire numbers (definition 2): numbers n with an even number of digits which have a factorization n = i*j where i and j have the same number of digits and the multiset of the digits of n coincides with the multiset of the digits of i and j.at n=19A014575
• Expansion of sum ( q^n / product( 1-q^k, k=1..3*n), n=0..inf ).at n=41A035295
• Poincaré series [or Poincare series] P(C_{3,2}(0); t).at n=42A124636
• Vampire numbers permutations of whose digits are other vampire numbers.at n=7A167266