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.
A014575
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.
Terms
- a(0) =1260a(1) =1395a(2) =1435a(3) =1530a(4) =1827a(5) =2187a(6) =6880a(7) =102510a(8) =104260a(9) =105210a(10) =105264a(11) =105750a(12) =108135a(13) =110758a(14) =115672a(15) =116725a(16) =117067a(17) =118440a(18) =120600a(19) =123354a(20) =124483a(21) =125248a(22) =125433a(23) =125460a(24) =125500a(25) =126027a(26) =126846a(27) =129640
External references
- oeis: A014575