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A117988
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Number of functions f:[n]->[n] such that f[(x^2) mod n]=[f(x)^2] mod n for all x in [n], for n=1,2,3,... Here [n] denotes {0,1,2,...,n-1}.
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3
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1, 4, 6, 16, 18, 576, 78, 1728, 1365, 5184, 486, 2985984, 3474, 389376, 13583700, 268435456, 65538, 119246400, 45006, 39261044736, 21400013700, 15116544, 67590, 45476068117708800, 8696104065, 772395264, 19496328075, 1822309056774144, 231340050
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OFFSET
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1,2
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COMMENTS
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See A117986 and A117987 for results on other modular functional equations.
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LINKS
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PROG
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(PARI) See Links section.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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