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A029876
Number of Giuga sequences of length n.
1
1, 2, 3, 17, 27
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
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
KEYWORD
nonn,hard,more,nice
EXTENSIONS
Offset corrected by Arkadiusz Wesolowski, Dec 30 2012
STATUS
approved