A039388 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A039388

Numbers whose base-9 representation has the same nonzero number of 5's and 7's.

52, 68, 133, 149, 214, 230, 295, 311, 376, 392, 412, 421, 430, 439, 448, 466, 468, 469, 470, 471, 472, 474, 476, 484, 538, 554, 572, 581, 590, 599, 608, 612, 613, 614, 615, 616, 618, 620, 626, 644, 700, 716, 781, 797, 862, 878, 943, 959, 1024, 1040

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

MATHEMATICA

Select[Range[1100], DigitCount[#, 9, 5]==DigitCount[#, 9, 7]>0&] (* Harvey P. Dale, Oct 09 2011 *)

CROSSREFS

Cf. A007095.

Sequence in context: A045178 A124471 A107933 * A043211 A043991 A326235

Adjacent sequences: A039385 A039386 A039387 * A039389 A039390 A039391

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved