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 A037460 a(n) = Sum{d(i)*6^i: i=0,1,...,m}, where Sum{d(i)*4^i: i=0,1,...,m} is the base 4 representation of n. 1
 0, 1, 2, 3, 6, 7, 8, 9, 12, 13, 14, 15, 18, 19, 20, 21, 36, 37, 38, 39, 42, 43, 44, 45, 48, 49, 50, 51, 54, 55, 56, 57, 72, 73, 74, 75, 78, 79, 80, 81, 84, 85, 86, 87, 90, 91, 92, 93, 108, 109, 110, 111, 114, 115, 116, 117, 120, 121, 122, 123, 126, 127, 128 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Clark Kimberling, Table of n, a(n) for n = 0..1000 MATHEMATICA Table[FromDigits[RealDigits[n, 4], 6], {n, 0, 100}] (* Clark Kimberling, Aug 14 2012 *) PROG (Julia) function a(n)     m, r, b = n, 0, 1     while m > 0         m, q = divrem(m, 4)         r += b * q         b *= 6     end r end; [a(n) for n in 0:62] |> println # Peter Luschny, Jan 03 2021 CROSSREFS Sequence in context: A336205 A047246 A039029 * A285134 A161824 A102806 Adjacent sequences:  A037457 A037458 A037459 * A037461 A037462 A037463 KEYWORD nonn,base AUTHOR EXTENSIONS Offset changed to 0 by Clark Kimberling, Aug 14 2012 STATUS approved

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Last modified April 10 10:39 EDT 2021. Contains 342845 sequences. (Running on oeis4.)