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A066972
Duplicate of A067819.
0
3, 12, 42, 144, 728, 2688, 10080, 39312, 127008, 423360, 2419200, 6773760, 32140800
OFFSET
1,1
CROSSREFS
Sequence in context: A358690 A084529 A017941 * A067819 A094970 A065179
KEYWORD
dead
STATUS
approved