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 A229309 Primitive numbers in A229305. 16
 10, 26, 43, 55, 57, 58, 136, 155, 222, 253, 355, 381, 737, 876, 904, 1027, 1055, 1081, 1552, 1711, 1751, 1962, 2696, 2758, 3197, 3403, 3411, 3775, 3916, 4063, 4401, 5093, 5671, 6176, 6567, 7111, 8251, 8515, 8702, 9316, 9465, 10768, 11026, 12195, 12742, 13301 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..46. Jose María Grau, A. M. Oller-Marcen, and J. Sondow, On the congruence 1^n + 2^n +... + n^n = d (mod n), where d divides n MATHEMATICA g[n_] := Mod[Sum[PowerMod[i, n, n], {i, 1, n}], n]; tachar[lis_, num_] := Select[lis, ! IntegerQ[#1/num] &]; primi[{}]={}; primi[lis_] := Join[{lis[[1]]}, primi[tachar[lis, lis[[1]]]]]; primi@Select[Range[80], !g[42*#] == # &] CROSSREFS Cf. A014117 (numbers n such that A031971(n)==1 (mod n)). Cf. A229300 (numbers n such that A031971(1806*n)== n (mod n*1806)). Cf. A229301 (numbers n such that A031971(42*n) == n (mod 42*n)). Cf. A229302 (numbers n such that A031971(6*n) == n (mod 6*n)). Cf. A229303 (numbers n such that A031971(2*n) == n (mod 2*n)). Cf. A229304 (numbers n such that A031971(1806*n) <> n (mod n*1806)). Cf. A229305 (numbers n such that A031971(42*n) <> n (mod 42*n)). Cf. A229306 (numbers n such that A031971(6*n) <> n (mod 6*n)). Cf. A229307 (numbers n such that A031971(2*n) <> n (mod 2*n)). Cf. A229308 (primitive numbers in A229304). Cf. A229309 (primitive numbers in A229305). Cf. A229310 (primitive numbers in A229306). Cf. A229311 (primitive numbers in A229307). Sequence in context: A054315 A113770 A223451 * A044452 A299409 A198017 Adjacent sequences: A229306 A229307 A229308 * A229310 A229311 A229312 KEYWORD nonn AUTHOR José María Grau Ribas, Sep 24 2013 STATUS approved

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Last modified July 13 21:44 EDT 2024. Contains 374288 sequences. (Running on oeis4.)