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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

17 divides a(n) for n > 1.

LINKS

Table of n, a(n) for n=1..15.

CROSSREFS

Cf. A127263 k^3 divides 2^(k^2) + 1).

Cf. A128678, A128679, A128680, A128681, A128682, A128683, A128684, A128685.

Cf. A177813, A177814, A177816, A177817, A177818, A177819, A177820.

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

Adjacent sequences:  A177813 A177814 A177815 * A177817 A177818 A177819

KEYWORD

nonn

AUTHOR

Alexander Adamchuk, May 14 2010

EXTENSIONS

Terms a(6) onward from Max Alekseyev, May 16 2010

STATUS

approved

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Last modified September 19 00:22 EDT 2021. Contains 347549 sequences. (Running on oeis4.)