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A087296
Duplicate of A065731.
0
1, 1, 1, 4, 16, 100, 676, 4900, 40000, 362404, 3625216, 39904489, 478996996
OFFSET
1,4
CROSSREFS
Sequence in context: A145823 A121142 A318693 * A065731 A074187 A111883
KEYWORD
dead
STATUS
approved