**Vampire numbers (definition 2): numbers n with an even number of digits which have a factorization n = i*j where length(i) = length(j) = length(n)/2 and the multiset of the digits of n coincides with the multiset of the digits of i and j.**

*1260, 1395, 1435, 1530, 1827, 2187, 6880, 102510, 104260, 105210, 105264*

*7 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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