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A061056
Duplicate of A060777.
0
1, 2, 3, 6, 12, 30, 72, 210, 630, 1920, 6336, 22176, 78975, 295680, 1144000, 4576000
OFFSET
1,2
CROSSREFS
Sequence in context: A375181 A261230 A014278 * A060777 A200744 A089430
KEYWORD
dead
AUTHOR
Ed Pegg Jr, May 28 2001
STATUS
approved