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A226297
Number of primitive permutations with n buds and 4 red or blue elements.
1
1, 12, 159, 2388, 40221, 751032
OFFSET
0,2
CROSSREFS
Sequence in context: A269642 A269411 A347748 * A286721 A349154 A112719
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 05 2013
STATUS
approved