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A053554
Duplicate of A048172.
4
1, 3, 19, 195, 2791, 51303, 1152019, 30564075, 935494831, 32447734143, 1257770533339, 53884306900515, 2528224238464471, 128934398091500823, 7101273378743303779, 420078397130637237915, 26563302733186339752511
OFFSET
1,2
CROSSREFS
Sequence in context: A028854 A222865 A108292 * A048172 A079145 A000763
KEYWORD
dead
STATUS
approved