A039409 Numbers whose base-10 representation has the same nonzero number of 1's and 9's.

19, 91, 109, 129, 139, 149, 159, 169, 179, 189, 190, 192, 193, 194, 195, 196, 197, 198, 219, 291, 319, 391, 419, 491, 519, 591, 619, 691, 719, 791, 819, 891, 901, 910, 912, 913, 914, 915, 916, 917, 918, 921, 931, 941, 951, 961, 971, 981, 1009, 1029

Offset

1,1

Links

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

Mathematica

Select[Range[1100], DigitCount[#, 10, 1]==DigitCount[#, 10, 9]>0&] (* Harvey P. Dale, Jan 08 2015 *)

Crossrefs

Sequence in context: A377729 A302710 A157875 * A038653 A043232 A044012

Adjacent sequences: A039406 A039407 A039408 * A039410 A039411 A039412

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved