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A081137
Duplicate of A027474.
0
0, 0, 1, 21, 294, 3430, 36015, 352947, 3294172, 29647548, 259416045, 2219448385
OFFSET
0,4
CROSSREFS
Sequence in context: A025944 A025962 A181381 * A027474 A021864 A020570
KEYWORD
dead
STATUS
approved