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A216717
Duplicate of A174072.
0
1, 2, 6, 24, 114, 674, 4714, 37754, 340404, 3412176, 37631268
OFFSET
1,2
CROSSREFS
Duplicate of A174072.
Sequence in context: A189846 A189283 A177522 * A174072 A224255 A326348
KEYWORD
dead
AUTHOR
N. J. A. Sloane, Sep 15 2012
STATUS
approved