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 A177818 Numbers k such that k^3 divides 18^(k^2) + 1. 9
 1, 19, 397841, 1152331, 3566699, 24128658809, 74683110361, 216316727651, 1339092172657, 7967201553697 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 19 divides a(n) for n > 1. LINKS 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: A013764 A078353 A347813 * A269446 A172824 A070632 Adjacent sequences:  A177815 A177816 A177817 * A177819 A177820 A177821 KEYWORD more,nonn AUTHOR Alexander Adamchuk, May 14 2010 EXTENSIONS a(6)-a(10) from Max Alekseyev, May 16 2010 STATUS approved

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Last modified September 24 02:30 EDT 2021. Contains 347618 sequences. (Running on oeis4.)