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A062763 a(n) is the greatest common divisor of (n-1)! and n^n. 3
1, 1, 1, 2, 1, 24, 1, 16, 9, 640, 1, 20736, 1, 7168, 6075, 2048, 1, 23887872, 1, 8192000, 321489, 2883584, 1, 10319560704, 625, 54525952, 59049, 2877292544, 1, 835884417024000000, 1, 67108864, 578739249, 36507222016, 187578125, 61628086298345472, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
a(n) = 1 iff n is 1 or a prime.
LINKS
FORMULA
a(n) = A051696(n)/n.
EXAMPLE
a(10) = gcd(9!, 10^10) = gcd(2^7*3^4*5*7, 2^10*5^10) = 2^7*5 = 640.
PROG
(PARI) a(n)=gcd((n-1)!, n^n); \\ Harry J. Smith, Aug 10 2009
CROSSREFS
Cf. A051696.
Sequence in context: A345262 A108778 A271530 * A243147 A261407 A037943
KEYWORD
nonn
AUTHOR
Henry Bottomley, Jul 16 2001
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)