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A186723
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a(n) = n^n! (mod 10)
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0
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0, 1, 4, 9, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6, 5, 6, 1, 6, 1, 0, 1, 6, 1, 6
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OFFSET
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0,3
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COMMENTS
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Periodic for n>3. Repeat: [6, 5, 6, 1, 6, 1, 0, 1, 6, 1]
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,1).
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FORMULA
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G.f.: x*(8*x^12 - 2*x^11 - x^8 - 6*x^7 - x^6 - 6*x^5 - 5*x^4 - 6*x^3 - 9*x^2 - 4*x - 1)/(x^10 - 1). - Chai Wah Wu, Jun 04 2016
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MATHEMATICA
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Table[PowerMod[n, n!, 10], {n, 0, 84}]
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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