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A004055 ((p-1)/2)! mod p for odd primes p. 1
1, 2, 6, 10, 5, 13, 18, 1, 12, 1, 31, 9, 42, 46, 23, 1, 11, 66, 1, 27, 78, 1, 34, 22, 91, 102, 1, 33, 15, 126, 130, 37, 1, 44, 1, 129, 162, 1, 80, 178, 162, 190, 81, 183, 198, 1, 1, 226, 122, 144, 1, 64, 1, 16, 262, 187, 1, 217, 53, 1, 138, 1, 1, 288, 114, 1, 189 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..9999 [b-file corrected by N. J. A. Sloane, Oct 04 2010]

CROSSREFS

Sequence in context: A052194 A073662 A086553 * A077933 A144762 A141572

Adjacent sequences:  A004052 A004053 A004054 * A004056 A004057 A004058

KEYWORD

nonn

AUTHOR

Jeffrey Shallit (shallit(AT)graceland.uwaterloo.ca)

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Last modified February 15 04:23 EST 2012. Contains 205694 sequences.