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A056466
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Number of primitive (aperiodic) palindromes using exactly five different symbols.
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2
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0, 0, 0, 0, 0, 0, 0, 0, 120, 120, 1800, 1800, 16800, 16800, 126000, 126000, 834120, 834000, 5103000, 5102880, 29607600, 29605800, 165528000, 165526200, 901020120, 901003320, 4809004080, 4808987400, 25292030400
(list; graph; refs; listen; history; internal format)
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