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A064456
A064434(n) = 0.
2
1, 3, 79, 235, 431, 1503, 2943, 6059, 6619, 18911, 54223, 302467995, 1772665631, 2148845167, 5145362667, 129465909327, 212089391807
OFFSET
1,2
COMMENTS
a(18) > 4*10^12. - Donovan Johnson, Jan 19 2011
Also indices n where A079878(n)=1. - R. J. Mathar, Nov 13 2011
PROG
(ARIBAS): a := 0; for n := 1 to 3000000000 do am := a; a := (am*2 + 1) mod n; if a = 0 then write(n, " "); end; end;
CROSSREFS
Cf. A064433.
Sequence in context: A222192 A236069 A364947 * A347165 A073176 A236574
KEYWORD
nonn,more
AUTHOR
Jonathan Ayres (JonathanAyres(AT)btinternet.com), Oct 01 2001
EXTENSIONS
More terms from Klaus Brockhaus, Oct 04 2001
Offset corrected and a(15)-a(17) from Donovan Johnson, Jan 19 2011
STATUS
approved