A039423 Numbers whose base-10 representation has the same nonzero number of 4's and 5's.

45, 54, 145, 154, 245, 254, 345, 354, 405, 415, 425, 435, 450, 451, 452, 453, 456, 457, 458, 459, 465, 475, 485, 495, 504, 514, 524, 534, 540, 541, 542, 543, 546, 547, 548, 549, 564, 574, 584, 594, 645, 654, 745, 754, 845, 854, 945, 954, 1045, 1054

Offset

1,1

Links

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

Mathematica

Select[Range[1100], DigitCount[#, 10, 4]==DigitCount[#, 10, 5]>0&] (* Harvey P. Dale, Jul 25 2019 *)

Crossrefs

Sequence in context: A242267 A242226 A335375 * A043246 A044026 A085607

Adjacent sequences: A039420 A039421 A039422 * A039424 A039425 A039426

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved