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A023710 Numbers with a single 1 in their base 4 expansion. 1
1, 4, 6, 7, 9, 13, 16, 18, 19, 24, 26, 27, 28, 30, 31, 33, 36, 38, 39, 41, 45, 49, 52, 54, 55, 57, 61, 64, 66, 67, 72, 74, 75, 76, 78, 79, 96, 98, 99, 104, 106, 107, 108, 110, 111, 112, 114, 115, 120, 122, 123, 124, 126, 127, 129, 132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

MATHEMATICA

Select[ Range[ 160 ], (Count[ IntegerDigits[ #, 4 ], 1 ]==1)& ]

CROSSREFS

Sequence in context: A067888 A189142 A043337 * A310657 A010448 A005621

Adjacent sequences:  A023707 A023708 A023709 * A023711 A023712 A023713

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)