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A061059
Duplicate of A060796.
0
2, 3, 6, 15, 55, 182, 715, 3135, 15015, 81345, 448630, 2733549
OFFSET
1,1
CROSSREFS
Sequence in context: A121688 A082094 A320963 * A060796 A059842 A001529
KEYWORD
dead
STATUS
approved