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 A045583 Numbers k that divide 10^k + 2^k. 1
 1, 2, 3, 4, 8, 9, 16, 21, 26, 27, 32, 63, 64, 81, 128, 136, 147, 189, 243, 256, 338, 441, 512, 567, 609, 729, 903, 1024, 1029, 1252, 1323, 1378, 1701, 1827, 2048, 2187, 2312, 2667, 2709, 3087, 3969, 4096, 4263, 4394, 4401, 5103, 5481, 6321, 6561, 7203, 8001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Amiram Eldar, Table of n, a(n) for n = 1..1500 MATHEMATICA Select[Range[8100], Divisible[10^#+2^#, #]&] (* Harvey P. Dale, Apr 02 2011 *) Select[Range[8001], Divisible[PowerMod[2, #, #] + PowerMod[10, #, #], #] &] (* Amiram Eldar, Oct 23 2021 *) CROSSREFS Cf. A050621. Sequence in context: A373725 A212255 A078829 * A045608 A068317 A074311 Adjacent sequences: A045580 A045581 A045582 * A045584 A045585 A045586 KEYWORD nonn AUTHOR David W. Wilson STATUS approved

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Last modified September 8 08:26 EDT 2024. Contains 375753 sequences. (Running on oeis4.)