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A025236
Duplicate of A014432.
0
1, 3, 3, 12, 30, 111, 363, 1353, 4917, 18777, 71769, 280506, 1103556, 4395009, 17622309
OFFSET
1,2
CROSSREFS
Sequence in context: A161804 A097342 A370145 * A014432 A107330 A076509
KEYWORD
dead
STATUS
approved