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A051921
Duplicate of A023998.
0
1, 1, 3, 16, 131, 1496, 22482, 426833, 9934563, 277006192, 9085194458
OFFSET
0,3
CROSSREFS
Sequence in context: A131490 A121673 A273997 * A023998 A241464 A341852
KEYWORD
dead
STATUS
approved