A039474 Numbers whose base-11 representation has the same nonzero number of 4's and 7's.

51, 81, 172, 202, 293, 323, 414, 444, 491, 502, 513, 524, 546, 557, 561, 562, 563, 564, 566, 567, 569, 570, 571, 579, 590, 601, 656, 686, 777, 807, 851, 862, 873, 884, 891, 892, 893, 894, 896, 897, 899, 900, 901, 906, 917, 939, 950, 961, 1019, 1049

Offset

1,1

Links

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

Mathematica

Select[Range[1200], DigitCount[#, 11, 4]==DigitCount[#, 11, 7]>0&]  (* Harvey P. Dale, Mar 14 2011 *)

Crossrefs

Sequence in context: A242045 A113285 A050698 * A253020 A351026 A020180

Adjacent sequences: A039471 A039472 A039473 * A039475 A039476 A039477

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved