A045147 - OEIS

A045147

Numbers whose base-4 representation contains exactly two 2's and four 3's.

2815, 3007, 3055, 3067, 3070, 3775, 3823, 3835, 3838, 4015, 4027, 4030, 4075, 4078, 4090, 6911, 7103, 7151, 7163, 7166, 7871, 7919, 7931, 7934, 8111, 8123, 8126, 8171, 8174, 8186, 8959, 9151, 9199, 9211, 9214, 9983

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..36.

MATHEMATICA

Select[Range[12000], DigitCount[#, 4, 2] == 2 && DigitCount[#, 4, 3] == 4&] (* Harvey P. Dale, Jan 05 2011 *)

CROSSREFS

Cf. A007090.

Sequence in context: A254916 A107533 A065668 * A202375 A236135 A179159

Adjacent sequences: A045144 A045145 A045146 * A045148 A045149 A045150

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved