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A012390
Duplicate of A009613.
0
2, 16, 392, 21376, 1875872, 227105536, 35750690432, 7110343684096
OFFSET
0,1
CROSSREFS
Sequence in context: A172149 A340563 A295710 * A009613 A012388 A297368
KEYWORD
dead
STATUS
approved