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A177816
Numbers k such that k^3 divides 16^(k^2) + 1.
9
1, 17, 707489, 5030929, 6029713, 209372172193, 250938565921, 1413292053713, 1784415176081, 24025953593297, 48948914347889, 1423524187400657, 5817190224008753, 49446116858851553, 74262006382962977
OFFSET
1,2
COMMENTS
17 divides a(n) for n > 1.
CROSSREFS
Cf. A127263 (k^3 divides 2^(k^2) + 1).
Cf. A128677 (least k > p such that (k*p)^3 divides (p-1)^(k*p)^2+1, where p = prime(n) > 2).
Sequence in context: A051157 A177918 A297488 * A130653 A125039 A125041
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, May 14 2010
EXTENSIONS
Terms a(6) onward from Max Alekseyev, May 16 2010
STATUS
approved