OFFSET
1,1
COMMENTS
Use definition 2 of vampire numbers; i.e., this is a subsequence of A014575.
EXAMPLE
The vampire number 102510 is included because all of its digits, including the duplicate 0 and 1, can be rearranged to give at least one other vampire number such as 105210.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Rick L. Shepherd, Oct 31 2009, Nov 01 2009
EXTENSIONS
Extended by Ray Chandler, Apr 26 2010
STATUS
approved