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A212497
A finite sequence (of length 12) in which every permutation of [1..4] is a substring.
1
4, 1, 2, 3, 4, 1, 2, 4, 3, 1, 2, 4
OFFSET
1,1
REFERENCES
Adleman, Leonard. Short permutation strings. Discrete Math. 10(1974), 197--200. MR0373911 (51 #10111)
CROSSREFS
Cf. A212498.
Sequence in context: A197889 A090204 A156915 * A072046 A123609 A215645
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, May 19 2012
STATUS
approved