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A081497
Duplicate of A028270.
3
1, 3, 8, 26, 90, 322, 1176, 4356, 16302, 61490, 233376, 890188, 3409588, 13104756
OFFSET
0,2
CROSSREFS
Sequence in context: A148817 A148818 A242903 * A028270 A124383 A148819
KEYWORD
dead
STATUS
approved