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A090059 Numbers n divisible by exactly four nontrivial permutations (rearrangements) of the digits of n. 4
31050, 50490, 70200, 92070, 100035, 100980, 102060, 105000, 108000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Trivial permutations are identified as (1) permutation = n, or (2) when n mod 10=0, permutations of n's digits which result in shifting only trailing zeros to the most significant side of n where they drop off, such that permutation = n/10^z, where z <= the number of trailing zeros of n. So if n were 1809000, the following permutations would be excluded as trivial: 1809000, 0180900, 0018090, 0001809.
LINKS
EXAMPLE
50490 is a term because 50490 is divisible by 459, 495, 594 and 4590, four nontrivial permutations of 50490.
CROSSREFS
Sequence in context: A236976 A143162 A256747 * A234888 A151815 A331675
KEYWORD
nonn,base,more
AUTHOR
Chuck Seggelin (barkeep(AT)plastereddragon.com), Nov 21 2003
STATUS
approved

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Last modified July 15 11:27 EDT 2024. Contains 374332 sequences. (Running on oeis4.)