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A083265
Duplicate of A067391.
0
1, 1, 2, 3, 12, 20, 60, 210, 840, 504, 2520, 27720, 27720, 51480, 360360, 180180
OFFSET
1,3
CROSSREFS
Sequence in context: A307035 A319404 A126292 * A067391 A096361 A105045
KEYWORD
dead
STATUS
approved