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A117988 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}. 3
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
See A117986 and A117987 for results on other modular functional equations.
LINKS
PROG
(PARI) See Links section.
CROSSREFS
Sequence in context: A186201 A138624 A071428 * A263636 A238411 A304909
KEYWORD
nonn
AUTHOR
John W. Layman, Apr 14 2006
EXTENSIONS
More terms from Rémy Sigrist, Sep 20 2019
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)