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A230310 Numbers n such that sum_{0<=a<72*n, 0<=b<72*n)} (a+b*i)^(72*n) <> 0 (mod 72*n), where i is the imaginary unit. 8
14, 28, 42, 55, 56, 70, 84, 95, 110, 112, 126, 140, 154, 165, 168, 182, 190, 210, 220, 224, 238, 252, 266, 275, 280, 285, 308, 322, 330, 336, 350, 364, 378, 380, 385, 406, 420, 434, 440, 448, 462, 475, 476, 495, 504, 506, 518, 532, 546, 550, 560, 570, 574, 602, 616, 630, 644, 658, 660, 665, 672, 700, 714, 715, 728, 742 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

MATHEMATICA

aa[n_] := Mod[Sum[PowerMod[ a + b I, n, n], {a, n}, {b, n}], n]; Select[Range[100], aa[72*#] > 0 &]

CROSSREFS

Cf. A230308-A230310.

Sequence in context: A118904 A164722 A162020 * A044854 A044899 A008596

Adjacent sequences:  A230307 A230308 A230309 * A230311 A230312 A230313

KEYWORD

nonn

AUTHOR

José María Grau Ribas, Oct 16 2013

EXTENSIONS

Terms a(7) onward from Max Alekseyev, Oct 16 2013

STATUS

approved

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Last modified July 22 07:23 EDT 2019. Contains 325216 sequences. (Running on oeis4.)