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A045128 Numbers n with property that in base 4 representation the numbers of 1's and 3's are 3 and 4, respectively. 0
5631, 6015, 6111, 6135, 6141, 7551, 7647, 7671, 7677, 8031, 8055, 8061, 8151, 8157, 8181, 13695, 13791, 13815, 13821, 14175, 14199, 14205, 14295, 14301, 14325, 15711, 15735, 15741, 15831, 15837, 15861, 16215, 16221 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..33.

MATHEMATICA

Reap[For[n=1, n<20000, n++, If[MatchQ[IntegerDigits[n, 4] // Tally // Sort, {___, {1, 3}, ___, {3, 4}}], Sow[n]]]][[2, 1]] (* Jean-Fran├žois Alcover, Dec 07 2016 *)

CROSSREFS

Sequence in context: A014799 A031573 A031753 * A229591 A161193 A022010

Adjacent sequences:  A045125 A045126 A045127 * A045129 A045130 A045131

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 27 03:03 EST 2020. Contains 332299 sequences. (Running on oeis4.)