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A216720
Duplicate of A174074.
0
2, 6, 22, 109, 657, 4625, 37186, 336336, 3379058, 37328103
OFFSET
3,1
CROSSREFS
Sequence in context: A339280 A129535 A375131 * A174074 A290279 A014371
KEYWORD
dead
STATUS
approved