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 A020336 Numbers n such that base 8 representation is the juxtaposition of two identical strings. 6
 9, 18, 27, 36, 45, 54, 63, 520, 585, 650, 715, 780, 845, 910, 975, 1040, 1105, 1170, 1235, 1300, 1365, 1430, 1495, 1560, 1625, 1690, 1755, 1820, 1885, 1950, 2015, 2080, 2145, 2210, 2275, 2340, 2405, 2470, 2535, 2600, 2665, 2730, 2795, 2860, 2925, 2990, 3055 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n) = n*8^floor(log_8(n)+1) + n. - Ilya Gutkovskiy, Jan 26 2018 CROSSREFS Cf. A020330, A020331, A020332, A020333, A020334, A020335, A020337, A020338. Sequence in context: A217373 A033021 A031493 * A044834 A033006 A259727 Adjacent sequences:  A020333 A020334 A020335 * A020337 A020338 A020339 KEYWORD nonn,base AUTHOR David W. Wilson, Melia Aldridge, ma38(AT)spruce.evansville.edu STATUS approved

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Last modified October 19 04:10 EDT 2019. Contains 328211 sequences. (Running on oeis4.)