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A057140
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Number of equivalence classes of self-dual 3-valued Post functions of n variables under action of semi-direct product of symmetric group S_n and complementing group C(n,3).
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1
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1, 4, 169, 3926427054, 15206669692893781237708064484944058, 166113478292106687629383993647806682871917942531896956843533578349271314189657277839057196220767581277199448858
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