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 A043690 a(n) = (s(n)-1)/2, where s(n) is the n-th number whose base-2 representation has exactly 9 runs. 1
 170, 298, 330, 338, 340, 341, 342, 346, 362, 426, 554, 586, 594, 596, 597, 598, 602, 618, 650, 658, 660, 661, 662, 666, 674, 676, 677, 678, 680, 681, 683, 684, 685, 686, 690, 692, 693, 694, 698, 714, 722, 724, 725, 726, 730 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA (# - 1)/2&/@Select[Range[50], Length[Split[IntegerDigits[#, 2]]]==9&] (* Vincenzo Librandi, Feb 22 2014 *) CROSSREFS Sequence in context: A218071 A113789 A261550 * A043575 A043746 A043762 Adjacent sequences: A043687 A043688 A043689 * A043691 A043692 A043693 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified March 29 03:40 EDT 2023. Contains 361596 sequences. (Running on oeis4.)