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 A043398 Numbers whose base-7 representation contains exactly two 1's. 0
 8, 50, 56, 58, 59, 60, 61, 62, 64, 71, 78, 85, 92, 106, 155, 204, 253, 302, 344, 350, 352, 353, 354, 355, 356, 358, 365, 372, 379, 386, 392, 394, 395, 396, 397, 398, 406, 408, 409, 410, 411, 412, 413, 415, 416, 417, 418, 419, 420 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..49. MATHEMATICA Select[Range[500], DigitCount[#, 7, 1]==2&] (* Harvey P. Dale, Mar 12 2011 *) CROSSREFS Cf. A007093. Sequence in context: A298151 A299125 A299883 * A038481 A043015 A076286 Adjacent sequences: A043395 A043396 A043397 * A043399 A043400 A043401 KEYWORD nonn,base AUTHOR Clark Kimberling STATUS approved

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Last modified December 10 19:44 EST 2023. Contains 367717 sequences. (Running on oeis4.)