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A029876 Number of Giuga sequences of length n. 1
1, 2, 3, 17, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

REFERENCES

J. M. Borwein, E. Wong: A Survey of Results Relating to Giuga's Conjecture on Primality. Vinet, Luc (ed.): Advances in Mathematical Sciences: CRM's 25 Years. Providence, RI: American Mathematical Society. CRM Proc. Lect. Notes. 11, 13-27 (1997).

LINKS

Table of n, a(n) for n=3..7.

D. Borwein, J. M. Borwein, P. B. Borwein and R. Girgensohn, Giuga's conjecture on primality, The American Mathematical Monthly, Vol. 103, No. 1 (1996), 40-50.

R. Mestrovic, On a Congruence Modulo n^3 Involving Two Consecutive Sums of Powers, Journal of Integer Sequences, Vol. 17 (2014), 14.8.4.

CROSSREFS

Cf. A007850.

Sequence in context: A023214 A225946 A095688 * A248716 A228201 A084445

Adjacent sequences:  A029873 A029874 A029875 * A029877 A029878 A029879

KEYWORD

nonn,hard,more,nice

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Offset corrected by Arkadiusz Wesolowski, Dec 30 2012

STATUS

approved

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Last modified February 20 21:05 EST 2019. Contains 320347 sequences. (Running on oeis4.)