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A177817
Numbers k such that k^3 divides 17^(k^2) + 1.
9
1, 3, 9, 21, 39, 63, 117, 273, 819, 1467, 2067, 3081, 4269, 6201, 7299, 9243, 10269, 12807, 14469, 16959, 19071, 20421, 21567, 23877, 29883, 43407, 48711, 50877, 51093, 55497, 64701, 89649, 94887, 118713, 133497, 142947, 146133, 149331
OFFSET
1,2
COMMENTS
3 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: A363242 A341433 A014857 * A292392 A112039 A007518
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, May 14 2010
STATUS
approved