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A056461
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Number of primitive (aperiodic) palindromes using a maximum of five different symbols.
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3
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5, 0, 20, 20, 120, 100, 620, 600, 3100, 3000, 15620, 15480, 78120, 77500, 390480, 390000, 1953120, 1949900, 9765620, 9762480, 48827480, 48812500, 244140620, 244124400, 1220703000, 1220625000, 6103512500
(list; graph; refs; listen; history; internal format)
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